Drugs Similar to PAROXETINE

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Nonclinical studies have shown that paroxetine is an SSRI. Paroxetine is not an estrogen, and its mechanism of action for the treatment of VMS is unknown. 12.2 Pharmacodynamics Studies at clinically relevant doses in humans have demonstrated that paroxetine blocks the uptake of serotonin into human platelets. In vitro studies in animals also suggest that paroxetine is a selective inhibitor of neuronal serotonin reuptake and has weak effects on norepinephrine and dopamine neuronal reuptake. In vitro radioligand binding studies indicate that paroxetine has little affinity for muscarinic alpha 1 -, alpha 2 -, beta-adrenergic-, dopamine (D 2 )-, 5-HT 1 -, 5-HT 2 -, and histamine (H 1 )-receptors. 12.3 Pharmacokinetics Absorption, Distribution, Metabolism and Excretion Absorption Paroxetine is completely absorbed after oral dosing of the mesylate salt. In a study in which healthy postmenopausal women (n=24) received Paroxetine Capsules 7.5 mg capsules as a daily dose for 14 days, steady-state paroxetine concentrations were achieved by approximately 12 days of dosing for most subjects, although it may take substantially longer in an occasional patient. Peak concentrations were reached at a median of 6 hours (3 to 8 hours range). Steady-state mean values of C max , C min , and AUC 0-last were 13.10 ng/mL (CV 91%), 7.17 ng/mL (CV 99%), and 237 hr * ng/mL (CV 94%), respectively. Steady-state AUC 0-24 values were about 3 times those of AUC 0-inf following a single dose, indicating non-linear pharmacokinetics. Steady-state C max values were approximately 5 times greater than those attained after a single dose and steady-state exposure based on AUC 0-24 was about 10 times greater than AUC 0-24 after a single dose. The nonlinear kinetics and excess accumulation are due to the fact that CYP2D6, an enzyme that is in part responsible for paroxetine metabolism, is readily saturable. The effects of food on the bioavailability of paroxetine were studied with paroxetine tablets at higher strength. AUC was only slightly increased (6%) when drug was administered with food but the C max was 29% greater, while the time to reach peak plasma concentration decreased from 6.4 hours post-dosing to 4.9 hours. Paroxetine Capsules can be taken with or without food. Distribution Paroxetine distributes throughout the body, including the central nervous system, with only 1% remaining in the plasma. Approximately 95% and 93% of paroxetine is bound to plasma protein at 100 ng/mL and 400 ng/mL, respectively. Under clinical conditions, paroxetine concentrations would normally be less than 100 ng/mL. Paroxetine does not alter the in vitro protein binding of phenytoin or warfarin. Metabolism Paroxetine is extensively metabolized after oral administration. The principal metabolites are polar and conjugated products of oxidation and methylation, which are readily cleared. Conjugates with glucuronic acid and sulfate predominate, and major metabolites have been isolated and identified. Data indicate that the metabolites have no more than 1/50 the potency of the parent compound at inhibiting serotonin uptake. The metabolism of paroxetine is accomplished in part by cytochrome CYP2D6. Saturation of this enzyme at clinical doses appears to account for the nonlinearity of paroxetine kinetics with increasing dose and increasing duration of treatment. The role of this enzyme in paroxetine metabolism also suggests potential drug-drug interactions [see Drug Interactions ( 7 )] . At steady state, when the CYP2D6 pathway is essentially saturated, paroxetine clearance is governed by alternative P450 isozymes, which, unlike CYP2D6, show no evidence of saturation. Excretion Approximately 64% of a 30 mg oral solution of paroxetine was excreted in the urine with 2% as the parent compound and 62% as metabolites over a 10-day post-dosing period. About 36% of the dose was excreted in the feces (probably via the bile), mostly as metabolites and less than 1% as the parent compound over the 10-day post-dosing period. Specific Populations Renal and Liver Impairment Increased plasma concentrations of paroxetine occur in subjects with renal and hepatic impairment. The mean plasma concentration in patients with creatinine clearance below 30 mL/min was approximately 4 times greater than seen in normal volunteers. Patients with creatinine clearance of 30 to 60 mL/min and patients with hepatic impairment had about a 2-fold increase in plasma concentrations (AUC, C max ). No Paroxetine Capsules dose adjustment is considered necessary in patients with renal or hepatic impairment. Elderly Patients In a multiple-dose study in the elderly at daily paroxetine doses of 20, 30, and 40 mg, C min concentrations were about 70% to 80% greater than the respective C min concentrations in nonelderly subjects. No Paroxetine Capsules dose adjustment is considered necessary in elderly patients. Drug Interaction Studies Potential Effect of Paroxetine Capsules on Other Drugs Drugs Metabolized by CYP3A4 An in vivo drug interaction study involving the co-administration under steady-state conditions of paroxetine and terfenadine, a substrate for cytochrome CYP3A4, revealed no effect of paroxetine on terfenadine pharmacokinetics. In vitro studies have shown ketoconazole, a potent inhibitor of CYP3A4 activity, to be at least 100 times more potent than paroxetine as an inhibitor of the metabolism of several substrates for CYP3A4, including astemizole, triazolam, and cyclosporine. Based on the assumption that the relationship between paroxetine’s in vitro Ki and its lack of effect on terfenadine’s in vivo clearance predicts its effect on other CYP3A4 substrates, paroxetine’s extent of inhibition of CYP3A4 activity is not likely to be of clinical significance. Drugs Metabolized by CYP2D6 Many drugs are metabolized by the cytochrome P450 isozyme CYP2D6. Like other agents that are metabolized by CYP2D6, paroxetine may significantly inhibit the activity of this isozyme. In most patients (> 90%), this CYP2D6 isozyme is saturated early during paroxetine dosing. Specific studies investigating the effect of paroxetine on drugs metabolized by CYP2D6 are listed below: Pimozide: Higher doses of paroxetine have been shown to elevate plasma levels of pimozide. In a controlled study of healthy volunteers, after paroxetine was titrated to 60 mg daily, co-administration of a single dose of 2 mg pimozide was associated with mean increases in pimozide AUC of 151% and C max of 62%, compared to pimozide administered alone [see Drug Interactions ( 7.1 )] . Tamoxifen: It is uncertain whether the co-administration of paroxetine and tamoxifen has a significant adverse effect on the efficacy of tamoxifen. Some studies have shown that the efficacy of tamoxifen, as measured by the risk of breast cancer relapse/mortality, may be reduced when co-prescribed with paroxetine as a result of paroxetine’s irreversible inhibition of CYP2D6. However, other studies have failed to demonstrate such a risk [see Warnings and Precautions ( 5.3 ) and Drug Interactions ( 7.1 )] . Desipramine: In one study, daily dosing of paroxetine (20 mg once daily) under steady-state conditions increased single dose desipramine (100 mg) C max , AUC, and T 1/2 by an average of approximately 2-, 5-, and 3-fold, respectively [see Drug Interactions ( 7.1 )] . Risperidone: Daily dosing of paroxetine 20 mg in patients stabilized on risperidone (4 to 8 mg/day), a CYP2D6 substrate, increased mean plasma concentrations of risperidone approximately 4-fold, decreased 9-hydroxyrisperidone concentrations approximately 10%, and increased concentrations of the active moiety (the sum of risperidone plus 9-hydroxyrisperidone) approximately 1.4-fold [see Drug Interactions ( 7.1 )] . Atomoxetine: The effect of paroxetine on the pharmacokinetics of atomoxetine has been evaluated when both drugs were at steady state. In healthy volunteers who were extensive metabolizers of CYP2D6, paroxetine 20 mg daily was given in combination with 20 mg atomoxetine every 12 hours. This resulted in increases in steady-state atomoxetine AUC values that were 6-to 8-fold greater and in atomoxetine C max values that were 3-to 4-fold greater than when atomoxetine was given alone [see Drug Interactions ( 7.1 )] . Digoxin: Mean digoxin AUC at steady state decreased by 15% in the presence of paroxetine [see Drug Interactions ( 7.1 )] . Beta Blockers: In a study in which propranolol (80 mg twice daily) was dosed orally for 18 days, the steady-state plasma concentrations of propranolol were unaltered during co-administration with paroxetine (30 mg once daily) for the final 10 days. The effects of propranolol on paroxetine have not been evaluated. Potential Effect of Other Drugs on Paroxetine Capsules Concomitant use of paroxetine with other drugs that alter CYP enzymes activities including CYP2D6 may affect the plasma concentrations of paroxetine. Specific studies investigating the effect of other drugs on paroxetine are listed below: Cimetidine: Cimetidine inhibits many cytochrome P450 enzymes. In a study in which paroxetine (30 mg once daily) was dosed orally for 4 weeks, steady-state plasma concentrations of paroxetine were increased by approximately 50% during co-administration with oral cimetidine (300 mg three times daily) for the final week [see Drug Interactions ( 7.2 )] . Phenobarbital: Phenobarbital induces many cytochrome P450 enzymes. When a single oral 30 mg dose of paroxetine was administered at phenobarbital steady state (100 mg once daily for 14 days), paroxetine AUC and T 1/2 were reduced (by an average of 25% and 38%, respectively) compared to paroxetine administered alone. The effect of paroxetine on phenobarbital pharmacokinetics was not studied. Because paroxetine exhibits nonlinear pharmacokinetics, the results of this study may not address the case where the 2 drugs are both being chronically dosed [see Drug Interactions ( 7.2 )] . Phenytoin: When a single oral 30 mg dose of paroxetine was administered at phenytoin steady state (300 mg once daily for 14 days), paroxetine AUC and T 1/2 were reduced (by an average of 50% and 35%, respectively) compared to paroxetine administered alone. In a separate study, when a single oral 300 mg dose of phenytoin was administered at paroxetine steady state (30 mg once daily for 14 days), phenytoin AUC was slightly reduced (12% on average) compared to phenytoin administered alone. Because both drugs exhibit nonlinear pharmacokinetics, the above studies may not address the case where the 2 drugs are both being chronically dosed [see Drug Interactions ( 7.2 )] . Digoxin: A clinical drug interaction study showed that concurrent use of digoxin did not affect paroxetine exposure. Diazepam: A clinical drug interaction study showed that concurrent use of diazepam did not affect paroxetine exposure.

Paroxetine tablets, USP contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine tablets USP are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, lactose monohydrate, sodium starch glycolate, dibasic calcium phosphate anhydrous, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol and polysorbate 80. In addition to this, 10 mg tablet contains D&C Yellow #10 Aluminum Lake and FD&C Yellow #6 Aluminum Lake. 20 mg and 40 mg tablets contain D&C Red #30 Aluminum Lake. 30 mg tablet contains FD&C Blue #2 Aluminum Lake. CHEMICAL STRUCTURE

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine hydrochloride is an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans - 4R -(4'-fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Tablets: Each film-coated tablet contains paroxetine hydrochloride equivalent to paroxetine as follows: 10 mg–beige to light brown (scored); 20 mg– beige to light brown (scored); 30 mg– beige to light brown, 40 mg– beige to light brown . Inactive ingredients consist of hypromellose, glyceryl behenate, lactose monohydrate, magnesium stearate, titanium dioxide, polyethylene glycols, iron oxide yellow and iron oxide red. The 10 mg and 20 mg strength tablets are functionally scored, each can be split into two halves. Formula structure

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans-4R-(4'-fluorophenyl)-3S-[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C19H20FNO3•HCl•1/2H2O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: [Image] Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

Paroxetine Oral Suspension contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'­methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine Oral Suspension Paroxetine Oral Suspension is for oral administration. Each 5 mL contains 10 mg of paroxetine equivalent to 11.1 mg of paroxetine hydrochloride. Inactive ingredients consist of polacrilin potassium, microcrystalline cellulose, carboxymethyl cellulose sodium, propylene glycol, glycerin, sorbitol, methylparaben, propylparaben, sodium citrate dihydrate, citric acid anhydrous, sodium saccharin, orange flavor (triacetin, propylene glycol, natural and artificial flavor), FD&C Yellow No. 6, simethicone emulsion and purified water. structure

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine extended-release tablets USP, contains paroxetine hydrochloride, USP an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4R-(4’-fluorophenyl)-3S-[(3’,4’­ methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride, USP is: Paroxetine hydrochloride, USP is white or almost white crystalline powder, having a melting point range of 120 o C to 138 o C and soluble in methanol and in alcohol, slightly soluble in water. Paroxetine extended-release tablets, USP are intended for oral administration. Each extended-release tablet contains 25 mg or 37.5 mg paroxetine equivalent to 28.51 mg or 42.76 mg of paroxetine hydrochloride USP, respectively. Each tablet consists of a hydrophilic matrix that contains the active material. Inactive ingredients consist of colloidal silicon dioxide, glyceryl dibehenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer, povidone K-30, talc and triethyl citrate. The film-coating material contains hypromellose, polyethylene glycol 400, polyethylene glycol 6000 and titanium dioxide. Additionally, 25 mg tablets contain D&C Red No. 30 Lake and polysorbate 80 and 37.5 mg tablets contain FD&C Blue No. 2 Aluminium Lake and talc. FDA approved dissolution test specifications differ from USP. paroxetine-str.jpg

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine extended-release tablets, contains paroxetine hydrochloride hemihydrate, USP an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3S,4R)-3-[(1,3 benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl) piperidine hydrochloride hemihydrate or Piperidine, 3-[(1,3-benzodioxol-5-yloxy)methyl]- 4-( 4-fluorophenyl)-, hydrochloride, (3S-trans)- and has the empirical formula of C 19 H 20 FNO 3 •HCl• 1 / 2 H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride hemihydrate, USP is a white to off white solid (or) powder, having a melting point range of 120°C to 142°C and soluble in methanol and in alcohol; slightly soluble in water. Paroxetine extended-release tablets are intended for oral administration. Each film-coated, extended-release tablet contains paroxetine hydrochloride USP equivalent to paroxetine 12.5 mg, 25 mg and 37.5 mg. One layer of the tablet consists of a degradable barrier layer and the other contains the active material in a hydrophilic matrix. Inactive ingredients consist of ferric oxide yellow, glyceryl behenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid – ethyl acrylate copolymer (1:1) type A, polyethylene glycols, polysorbate 80, polyvinylpyrrolidone, silicon dioxide, sodium lauryl sulfate, talc, titanium dioxide, triethyl citrate, film-coating material contains - FD&C Yellow #6/sunset yellow FCF aluminum lake, FD&C blue #2/Indigo carmine AL 3% to 5% and D&C Yellow #10 aluminum lake for 12.5 mg; D&C Red #30/Helendon pink aluminum lake for 25 mg and FD&C blue #2/Indigo carmine AL 3% to 5% and FD&C blue #2 Indigo carmine aluminum lake for 37.5 mg. paroxetine-structure.jpg

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

BRISDELLE (paroxetine) is an orally administered selective serotonin reuptake inhibitor (SSRI) for the treatment of moderate to severe VMS associated with menopause. It is identified chemically as (-)- trans -4R- (4’-fluorophenyl) - 3S - [(3’, 4’-methylenedioxyphenoxy) methyl] piperidine mesylate and has the empirical formula of C 19 H 20 FNO 3 •CH 3 SO 3 H. The molecular weight is 425.5 (329.4 as free base). The structural formula is: The mesylate salt of paroxetine is an odorless, off-white powder, having a melting point range of 147° to 150°C and a solubility of more than 1 g/mL in water. Each pink capsule contains 9.69 mg of paroxetine mesylate equivalent to 7.5 mg paroxetine base. Inactive ingredients consist of: dibasic calcium phosphate, sodium starch glycolate, magnesium stearate, gelatin, titanium dioxide, FD&C Yellow #6, FD&C Red #3, FD&C Red #40, shellac, and black iron oxide. image description

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine extended-release tablets, contains paroxetine hydrochloride hemihydrate, USP an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3S,4R)-3-[(1,3 benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl) piperidine hydrochloride hemihydrate or Piperidine, 3-[(1,3-benzodioxol-5-yloxy)methyl]- 4-( 4-fluorophenyl)-, hydrochloride, (3S-trans)- and has the empirical formula of C 19 H 20 FNO 3 •HCl• 1 / 2 H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride hemihydrate, USP is a white to off white solid (or) powder, having a melting point range of 120°C to 142°C and soluble in methanol and in alcohol; slightly soluble in water. Paroxetine extended-release tablets are intended for oral administration. Each film-coated, extended-release tablet contains paroxetine hydrochloride USP equivalent to paroxetine 12.5 mg, 25 mg and 37.5 mg. One layer of the tablet consists of a degradable barrier layer and the other contains the active material in a hydrophilic matrix. Inactive ingredients consist of ferric oxide yellow, glyceryl behenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid – ethyl acrylate copolymer (1:1) type A, polyethylene glycols, polysorbate 80, polyvinylpyrrolidone, silicon dioxide, sodium lauryl sulfate, talc, titanium dioxide, triethyl citrate, film-coating material contains - FD&C Yellow #6/sunset yellow FCF aluminum lake, FD&C blue #2/Indigo carmine AL 3% to 5% and D&C Yellow #10 aluminum lake for 12.5 mg; D&C Red #30/Helendon pink aluminum lake for 25 mg and FD&C blue #2/Indigo carmine AL 3% to 5% and FD&C blue #2 Indigo carmine aluminum lake for 37.5 mg. paroxetine-structure.jpg

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans-4R-(4'-fluorophenyl)-3S-[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C19H20FNO3•HCl•1/2H2O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: [Image] Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

Paroxetine Oral Suspension contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'­methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine Oral Suspension Paroxetine Oral Suspension is for oral administration. Each 5 mL contains 10 mg of paroxetine equivalent to 11.1 mg of paroxetine hydrochloride. Inactive ingredients consist of polacrilin potassium, microcrystalline cellulose, carboxymethyl cellulose sodium, propylene glycol, glycerin, sorbitol, methylparaben, propylparaben, sodium citrate dihydrate, citric acid anhydrous, sodium saccharin, orange flavor (triacetin, propylene glycol, natural and artificial flavor), FD&C Yellow No. 6, simethicone emulsion and purified water. structure

Paroxetine tablets, USP contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine tablets USP are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, lactose monohydrate, sodium starch glycolate, dibasic calcium phosphate anhydrous, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol and polysorbate 80. In addition to this, 10 mg tablet contains D&C Yellow #10 Aluminum Lake and FD&C Yellow #6 Aluminum Lake. 20 mg and 40 mg tablets contain D&C Red #30 Aluminum Lake. 30 mg tablet contains FD&C Blue #2 Aluminum Lake. CHEMICAL STRUCTURE

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide.

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine hydrochloride is an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans - 4R -(4'-fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Tablets: Each film-coated tablet contains paroxetine hydrochloride equivalent to paroxetine as follows: 10 mg–beige to light brown (scored); 20 mg– beige to light brown (scored); 30 mg– beige to light brown, 40 mg– beige to light brown . Inactive ingredients consist of hypromellose, glyceryl behenate, lactose monohydrate, magnesium stearate, titanium dioxide, polyethylene glycols, iron oxide yellow and iron oxide red. The 10 mg and 20 mg strength tablets are functionally scored, each can be split into two halves. Formula structure

CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Nonclinical studies have shown that paroxetine is an SSRI. Paroxetine is not an estrogen, and its mechanism of action for the treatment of VMS is unknown. 12.2 Pharmacodynamics Studies at clinically relevant doses in humans have demonstrated that paroxetine blocks the uptake of serotonin into human platelets. In vitro studies in animals also suggest that paroxetine is a selective inhibitor of neuronal serotonin reuptake and has weak effects on norepinephrine and dopamine neuronal reuptake. In vitro radioligand binding studies indicate that paroxetine has little affinity for muscarinic alpha 1 -, alpha 2 -, beta-adrenergic-, dopamine (D 2 )-, 5-HT 1 -, 5-HT 2 -, and histamine (H 1 )-receptors. 12.3 Pharmacokinetics Absorption, Distribution, Metabolism and Excretion Absorption Paroxetine is completely absorbed after oral dosing of the mesylate salt. In a study in which healthy postmenopausal women (n=24) received Paroxetine Capsules 7.5 mg capsules as a daily dose for 14 days, steady-state paroxetine concentrations were achieved by approximately 12 days of dosing for most subjects, although it may take substantially longer in an occasional patient. Peak concentrations were reached at a median of 6 hours (3 to 8 hours range). Steady-state mean values of C max , C min , and AUC 0-last were 13.10 ng/mL (CV 91%), 7.17 ng/mL (CV 99%), and 237 hr * ng/mL (CV 94%), respectively. Steady-state AUC 0-24 values were about 3 times those of AUC 0-inf following a single dose, indicating non-linear pharmacokinetics. Steady-state C max values were approximately 5 times greater than those attained after a single dose and steady-state exposure based on AUC 0-24 was about 10 times greater than AUC 0-24 after a single dose. The nonlinear kinetics and excess accumulation are due to the fact that CYP2D6, an enzyme that is in part responsible for paroxetine metabolism, is readily saturable. The effects of food on the bioavailability of paroxetine were studied with paroxetine tablets at higher strength. AUC was only slightly increased (6%) when drug was administered with food but the C max was 29% greater, while the time to reach peak plasma concentration decreased from 6.4 hours post-dosing to 4.9 hours. Paroxetine Capsules can be taken with or without food. Distribution Paroxetine distributes throughout the body, including the central nervous system, with only 1% remaining in the plasma. Approximately 95% and 93% of paroxetine is bound to plasma protein at 100 ng/mL and 400 ng/mL, respectively. Under clinical conditions, paroxetine concentrations would normally be less than 100 ng/mL. Paroxetine does not alter the in vitro protein binding of phenytoin or warfarin. Metabolism Paroxetine is extensively metabolized after oral administration. The principal metabolites are polar and conjugated products of oxidation and methylation, which are readily cleared. Conjugates with glucuronic acid and sulfate predominate, and major metabolites have been isolated and identified. Data indicate that the metabolites have no more than 1/50 the potency of the parent compound at inhibiting serotonin uptake. The metabolism of paroxetine is accomplished in part by cytochrome CYP2D6. Saturation of this enzyme at clinical doses appears to account for the nonlinearity of paroxetine kinetics with increasing dose and increasing duration of treatment. The role of this enzyme in paroxetine metabolism also suggests potential drug-drug interactions [see Drug Interactions ( 7 )] . At steady state, when the CYP2D6 pathway is essentially saturated, paroxetine clearance is governed by alternative P450 isozymes, which, unlike CYP2D6, show no evidence of saturation. Excretion Approximately 64% of a 30 mg oral solution of paroxetine was excreted in the urine with 2% as the parent compound and 62% as metabolites over a 10-day post-dosing period. About 36% of the dose was excreted in the feces (probably via the bile), mostly as metabolites and less than 1% as the parent compound over the 10-day post-dosing period. Specific Populations Renal and Liver Impairment Increased plasma concentrations of paroxetine occur in subjects with renal and hepatic impairment. The mean plasma concentration in patients with creatinine clearance below 30 mL/min was approximately 4 times greater than seen in normal volunteers. Patients with creatinine clearance of 30 to 60 mL/min and patients with hepatic impairment had about a 2-fold increase in plasma concentrations (AUC, C max ). No Paroxetine Capsules dose adjustment is considered necessary in patients with renal or hepatic impairment. Elderly Patients In a multiple-dose study in the elderly at daily paroxetine doses of 20, 30, and 40 mg, C min concentrations were about 70% to 80% greater than the respective C min concentrations in nonelderly subjects. No Paroxetine Capsules dose adjustment is considered necessary in elderly patients. Drug Interaction Studies Potential Effect of Paroxetine Capsules on Other Drugs Drugs Metabolized by CYP3A4 An in vivo drug interaction study involving the co-administration under steady-state conditions of paroxetine and terfenadine, a substrate for cytochrome CYP3A4, revealed no effect of paroxetine on terfenadine pharmacokinetics. In vitro studies have shown ketoconazole, a potent inhibitor of CYP3A4 activity, to be at least 100 times more potent than paroxetine as an inhibitor of the metabolism of several substrates for CYP3A4, including astemizole, triazolam, and cyclosporine. Based on the assumption that the relationship between paroxetine’s in vitro Ki and its lack of effect on terfenadine’s in vivo clearance predicts its effect on other CYP3A4 substrates, paroxetine’s extent of inhibition of CYP3A4 activity is not likely to be of clinical significance. Drugs Metabolized by CYP2D6 Many drugs are metabolized by the cytochrome P450 isozyme CYP2D6. Like other agents that are metabolized by CYP2D6, paroxetine may significantly inhibit the activity of this isozyme. In most patients (> 90%), this CYP2D6 isozyme is saturated early during paroxetine dosing. Specific studies investigating the effect of paroxetine on drugs metabolized by CYP2D6 are listed below: Pimozide: Higher doses of paroxetine have been shown to elevate plasma levels of pimozide. In a controlled study of healthy volunteers, after paroxetine was titrated to 60 mg daily, co-administration of a single dose of 2 mg pimozide was associated with mean increases in pimozide AUC of 151% and C max of 62%, compared to pimozide administered alone [see Drug Interactions ( 7.1 )] . Tamoxifen: It is uncertain whether the co-administration of paroxetine and tamoxifen has a significant adverse effect on the efficacy of tamoxifen. Some studies have shown that the efficacy of tamoxifen, as measured by the risk of breast cancer relapse/mortality, may be reduced when co-prescribed with paroxetine as a result of paroxetine’s irreversible inhibition of CYP2D6. However, other studies have failed to demonstrate such a risk [see Warnings and Precautions ( 5.3 ) and Drug Interactions ( 7.1 )] . Desipramine: In one study, daily dosing of paroxetine (20 mg once daily) under steady-state conditions increased single dose desipramine (100 mg) C max , AUC, and T 1/2 by an average of approximately 2-, 5-, and 3-fold, respectively [see Drug Interactions ( 7.1 )] . Risperidone: Daily dosing of paroxetine 20 mg in patients stabilized on risperidone (4 to 8 mg/day), a CYP2D6 substrate, increased mean plasma concentrations of risperidone approximately 4-fold, decreased 9-hydroxyrisperidone concentrations approximately 10%, and increased concentrations of the active moiety (the sum of risperidone plus 9-hydroxyrisperidone) approximately 1.4-fold [see Drug Interactions ( 7.1 )] . Atomoxetine: The effect of paroxetine on the pharmacokinetics of atomoxetine has been evaluated when both drugs were at steady state. In healthy volunteers who were extensive metabolizers of CYP2D6, paroxetine 20 mg daily was given in combination with 20 mg atomoxetine every 12 hours. This resulted in increases in steady-state atomoxetine AUC values that were 6-to 8-fold greater and in atomoxetine C max values that were 3-to 4-fold greater than when atomoxetine was given alone [see Drug Interactions ( 7.1 )] . Digoxin: Mean digoxin AUC at steady state decreased by 15% in the presence of paroxetine [see Drug Interactions ( 7.1 )] . Beta Blockers: In a study in which propranolol (80 mg twice daily) was dosed orally for 18 days, the steady-state plasma concentrations of propranolol were unaltered during co-administration with paroxetine (30 mg once daily) for the final 10 days. The effects of propranolol on paroxetine have not been evaluated. Potential Effect of Other Drugs on Paroxetine Capsules Concomitant use of paroxetine with other drugs that alter CYP enzymes activities including CYP2D6 may affect the plasma concentrations of paroxetine. Specific studies investigating the effect of other drugs on paroxetine are listed below: Cimetidine: Cimetidine inhibits many cytochrome P450 enzymes. In a study in which paroxetine (30 mg once daily) was dosed orally for 4 weeks, steady-state plasma concentrations of paroxetine were increased by approximately 50% during co-administration with oral cimetidine (300 mg three times daily) for the final week [see Drug Interactions ( 7.2 )] . Phenobarbital: Phenobarbital induces many cytochrome P450 enzymes. When a single oral 30 mg dose of paroxetine was administered at phenobarbital steady state (100 mg once daily for 14 days), paroxetine AUC and T 1/2 were reduced (by an average of 25% and 38%, respectively) compared to paroxetine administered alone. The effect of paroxetine on phenobarbital pharmacokinetics was not studied. Because paroxetine exhibits nonlinear pharmacokinetics, the results of this study may not address the case where the 2 drugs are both being chronically dosed [see Drug Interactions ( 7.2 )] . Phenytoin: When a single oral 30 mg dose of paroxetine was administered at phenytoin steady state (300 mg once daily for 14 days), paroxetine AUC and T 1/2 were reduced (by an average of 50% and 35%, respectively) compared to paroxetine administered alone. In a separate study, when a single oral 300 mg dose of phenytoin was administered at paroxetine steady state (30 mg once daily for 14 days), phenytoin AUC was slightly reduced (12% on average) compared to phenytoin administered alone. Because both drugs exhibit nonlinear pharmacokinetics, the above studies may not address the case where the 2 drugs are both being chronically dosed [see Drug Interactions ( 7.2 )] . Digoxin: A clinical drug interaction study showed that concurrent use of digoxin did not affect paroxetine exposure. Diazepam: A clinical drug interaction study showed that concurrent use of diazepam did not affect paroxetine exposure.

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride hemihydrate is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120° to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Each paroxetine tablet, USP intended for oral administration contains paroxetine hydrochloride hemihydrate equivalent to 10 mg or 20 mg or 30 mg or 40 mg of paroxetine. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structured formula for Paroxetine

Paroxetine extended-release tablets USP, contains paroxetine hydrochloride, USP an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4R-(4’-fluorophenyl)-3S-[(3’,4’­ methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride, USP is: Paroxetine hydrochloride, USP is white or almost white crystalline powder, having a melting point range of 120 o C to 138 o C and soluble in methanol and in alcohol, slightly soluble in water. Paroxetine extended-release tablets, USP are intended for oral administration. Each extended-release tablet contains 25 mg or 37.5 mg paroxetine equivalent to 28.51 mg or 42.76 mg of paroxetine hydrochloride USP, respectively. Each tablet consists of a hydrophilic matrix that contains the active material. Inactive ingredients consist of colloidal silicon dioxide, glyceryl dibehenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer, povidone K-30, talc and triethyl citrate. The film-coating material contains hypromellose, polyethylene glycol 400, polyethylene glycol 6000 and titanium dioxide. Additionally, 25 mg tablets contain D&C Red No. 30 Lake and polysorbate 80 and 37.5 mg tablets contain FD&C Blue No. 2 Aluminium Lake and talc. FDA approved dissolution test specifications differ from USP. paroxetine-str.jpg

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets, USP are an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans-4R-(4'-fluorophenyl)-3S-[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Each film-coated tablet contains paroxetine hydrochloride equivalent to paroxetine as follows: 10 mg–yellow (scored); 20 mg–pink (scored); 30 mg–blue, 40 mg–pink. Inactive ingredients consist of dibasic calcium phosphate dihydrate, lactose monohydrate, sodium starch glycolate, dibasic calcium phosphate anhydrous, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol and polysorbate 80. In addition to this, 10 mg tablet contains D&C Yellow #10 Aluminum Lake and FD&C Yellow #6 Aluminum Lake. 20 mg and 40 mg tablets contain D&C Red #30 Aluminum Lake. 30 mg tablet contains FD&C Blue #2 Aluminum Lake. paroxetine-fig1

Paroxetine extended-release tablets, USP contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ∙HCl∙1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120°C to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine extended-release tablets, USP are intended for oral administration. Each extended-release tablet contains 12.5 mg, 25 mg, or 37.5 mg paroxetine equivalent to 14.25 mg, 28.51 mg, or 42.76 mg of paroxetine hydrochloride, respectively. One layer of the tablet consists of a degradable barrier layer and the other contains the active material in a hydrophilic matrix. Inactive ingredients consist of colloidal silicon dioxide, hypromellose, lactose monohydrate, magnesium stearate, ferric oxide yellow (12.5mg, 25 mg and 37.5 mg), glyceryl dibehenate, D&C Yellow No. 10 aluminum lake (12.5 mg), FD&C Blue No. 2 aluminum lake (12.5 mg and 37.5 mg), FD&C Red No. 40 aluminum lake (12.5 mg), FD&C Yellow No. 6 aluminum lake (12.5 mg), ferric oxide red (25 mg), ferrosoferric oxide (25 mg), methacrylic acid and ethyl acrylate copolymer dispersion, polyethylene glycol, polysorbate 80, sodium lauryl sulfate, talc, titanium dioxide and triethyl citrate. FDA approved dissolution test specifications differ from USP. Chemical Structure

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine hydrochloride is an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans - 4R -(4'-fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Tablets: Each film-coated tablet contains paroxetine hydrochloride equivalent to paroxetine as follows: 10 mg–beige to light brown (scored); 20 mg– beige to light brown (scored); 30 mg– beige to light brown, 40 mg– beige to light brown . Inactive ingredients consist of hypromellose, glyceryl behenate, lactose monohydrate, magnesium stearate, titanium dioxide, polyethylene glycols, iron oxide yellow and iron oxide red. The 10 mg and 20 mg strength tablets are functionally scored, each can be split into two halves. Formula structure

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Structural Formula

PAXIL contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4R-(4'-fluorophenyl)-3S-[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ·HCl·1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off‑white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. PAXIL Tablets PAXIL tablets are for oral administration. Each film‑coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, hypromellose, magnesium stearate, polyethylene glycols, polysorbate 80, sodium starch glycolate, titanium dioxide, and 1 or more of the following: D&C Red No. 30 aluminum lake, D&C Yellow No. 10 aluminum lake, FD&C Blue No. 2 aluminum lake, FD&C Yellow No. 6 aluminum lake. PAXIL Oral Suspension PAXIL oral suspension is for oral administration. Each 5 mL contains 10 mg of paroxetine equivalent to 11.1 mg of paroxetine hydrochloride. The oral suspension is not currently marketed. Inactive ingredients consist of citric acid (anhydrous), FD&C yellow No. 6, flavorings, glycerin, methylparaben, microcrystalline cellulose and carboxymethylcellulose sodium, polacrilin potassium, propylene glycol, propylparaben, purified water, saccharin sodium, simethicone emulsion and sodium citrate (dihydrate).

Paroxetine Extended-Release Tablets, USP contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R- (4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ∙HCl∙1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120°C to 138°C and a solubility of 5.4 mg/mL in water. Each enteric coated, extended-release tablet contains paroxetine base of 12.5 mg (white tablet), 25 mg (brown tablet), 37.5 mg (orange tablet), which is equivalent to 14.25 mg, 28.51 mg, or 42.76 mg of paroxetine hydrochloride, respectively. Each tablet consists of a hydrophilic matrix that contains the active material. Inactive ingredients consist of carboxymethylcellulose sodium, copovidone, glyceryl monostearate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid – ethyl acrylate copolymer (1:1), polysorbate 80, silicon dioxide, sodium lauryl sulfate, talcum, titanium dioxide, and triethyl citrate. In addition, the 25 mg tablets also contain the following coloring agents: iron oxide black and iron oxide red and the 37.5 mg tablets contain iron oxide red and iron oxide yellow. USP dissolution test is pending. Chemical Structure

Paroxetine tablets contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3 S - trans )-3-[(1,3-Benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl)-piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP (hemihydrate) is an odorless, white or almost white crystalline powder, having a melting point range of 129° to 131°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg or 40 mg paroxetine equivalent to 11.38 mg, 22.76 mg, 34.14 mg or 45.52 mg of paroxetine hydrochloride hemihydrate, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, FD&C Blue No. 1 Aluminum Lake, hydroxypropyl cellulose, hypromellose, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, sodium lauryl sulfate, sodium starch glycolate (potato), titanium dioxide and triacetin. Paroxetine Hydrochloride Meets USP Organic Impurities Test 1. Paroxetine Structural Formula

Paroxetine hydrochloride is an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Structured formula for Paroxetine

Paroxetine tablets, USP contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, white to off-white crystalline powder, having a melting point range of 120°C to 138°C. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in dichloromethane and slightly soluble in water. Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. In addition, each tablet contains the following inactive ingredients: dibasic calcium phosphate anhydrous, hypromellose 6 cP, lactose anhydrous, magnesium stearate, polyethylene glycol 6000, povidone, sodium starch glycolate, talc, and titanium dioxide. Image

Paroxetine tablets contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3 S - trans )-3-[(1,3-Benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl)-piperidine hydrochloride hemihydrate and has the molecular formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP (hemihydrate) is an odorless, white or almost white crystalline powder, having a melting point range of 129° to 131°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets: Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg or 40 mg paroxetine equivalent to 11.38 mg, 22.76 mg, 34.14 mg or 45.52 mg of paroxetine hydrochloride hemihydrate, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, FD&C Blue No. 1 Aluminum Lake, hydroxypropyl cellulose, hypromellose, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, sodium lauryl sulfate, sodium starch glycolate (potato), titanium dioxide and triacetin. Paroxetine Hydrochloride Meets USP Organic Impurities Test 1. Paroxetine Structural Formula

Paroxetine tablets contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3 S - trans )-3-[(1,3-Benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl)-piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP (hemihydrate) is an odorless, white or almost white crystalline powder, having a melting point range of 129° to 131°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg or 40 mg paroxetine equivalent to 11.38 mg, 22.76 mg, 34.14 mg or 45.52 mg of paroxetine hydrochloride hemihydrate, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, FD&C Blue No. 1 Aluminum Lake, hydroxypropyl cellulose, hypromellose, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, sodium lauryl sulfate, sodium starch glycolate (potato), titanium dioxide and triacetin. Paroxetine Hydrochloride Meets USP Organic Impurities Test 1. Paroxetine Structural Formula

Paroxetine hydrochloride is an orally administered psychotropic drug. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans - 4R -(4' - fluorophenyl)- 3S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Structured formula for Paroxetine

Paroxetine tablets contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (3 S - trans )-3-[(1,3-Benzodioxol-5-yloxy)methyl]-4-(4-fluorophenyl)-piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP (hemihydrate) is an odorless, white or almost white crystalline powder, having a melting point range of 129° to 131°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg or 40 mg paroxetine equivalent to 11.38 mg, 22.76 mg, 34.14 mg or 45.52 mg of paroxetine hydrochloride hemihydrate, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, FD&C Blue No. 1 Aluminum Lake, hydroxypropyl cellulose, hypromellose, magnesium stearate, microcrystalline cellulose, polydextrose, polyethylene glycol, sodium lauryl sulfate, sodium starch glycolate (potato), titanium dioxide and triacetin. Paroxetine Hydrochloride Meets USP Organic Impurities Test 1. Paroxetine Structural Formula

Paroxetine tablets contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'- methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride, USP is an odorless, off-white powder, having a melting point range of 120 o to 138 o C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets Paroxetine tablets are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of glyceryl behenate, hypromellose, iron oxide red, iron oxide yellow, lactose monohydrate, magnesium stearate, polyethylene glycols and titanium dioxide. picture1

Paroxetine Extended-Release Tablets, USP contain paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R- (4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 •HCl•1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120° C to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine Extended-Release Tablets, USP are intended for oral administration. Each enteric, film-coated, extended-release tablet contains paroxetine hydrochloride equivalent to paroxetine as follows: 12.5 mg–white, 25 mg–pink and 37.5 mg–blue. Inactive ingredients consist of hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl acrylate copolymer dispersion, polyethylene glycols, polyvinyl alcohol, povidone, silicon dioxide, talc, titanium dioxide, triethyl citrate. In addition, the 25 mg and 37.5 mg colorant contains FD&C Blue No. 2 aluminum lake. In addition, the 25 mg colorant also contains carmine. Paroxetine meets USP Dissolution Test 3. Formula

Paroxetine HCL CR USP, contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans-4R-(4'-fluorophenyl)-3S-[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ·HCl·1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off‑white powder, having a melting point range of 120°C to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine HCL CR tablets, USP are intended for oral administration. Each extended‑release tablet contains 12.5 mg, 25 mg, or 37.5 mg paroxetine equivalent to 14.25 mg, 28.51 mg, or 42.76 mg of paroxetine hydrochloride, respectively. One layer of the tablet consists of a degradable barrier layer and the other contains the active material in a hydrophilic matrix. Inactive ingredients consist of glyceryl behenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer type C, polyethylene glycols, polysorbate 80, polyvinylpyrrolidone, silicon dioxide, sodium lauryl sulfate, talc, titanium dioxide, triethyl citrate and the following colorants: D&C Red No. 30 aluminum lake (25 mg), D&C Yellow No. 10 aluminum lake (12.5 mg), FD&C Blue No. 2 aluminum lake (37.5 mg), FD&C Yellow No. 6 aluminum lake (12.5 mg), red ferric oxide (25 mg) and Yellow ferric oxide (12.5 mg and 37.5 mg).

Paroxetine hydrochloride is an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ·HCl·1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets, USP Paroxetine tablets, USP are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, hypromellose, magnesium stearate, polydextrose, polyethylene glycols, sodium starch glycolate, titanium dioxide and triacetin. The 10 mg tablet also contains: FD&C Yellow #6/Sunset Yellow FCF Aluminum Lake. The 20 mg tablet also contains: D&C Yellow #10 Aluminum Lake, yellow iron oxide and black iron oxide. The 40 mg tablet also contains: FD&C Yellow #6/Sunset Yellow FCF Aluminum Lake, FD&C Blue #2/Indigo Carmine Aluminum Lake and black iron oxide.

PAXIL CR, contains paroxetine hydrochloride, an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)-trans-4R-(4'-fluorophenyl)-3S-[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ·HCl·1/2H 2 O. The molecular weight is 374.8 g/mol (329.4 g/mol as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off‑white powder, having a melting point range of 120° C to 138°C and a solubility of 5.4 mg/mL in water. PAXIL CR tablets are intended for oral administration. Each extended‑release tablet contains 12.5 mg, 25 mg, or 37.5 mg paroxetine equivalent to 14.25 mg, 28.51 mg, or 42.76 mg of paroxetine hydrochloride, respectively. One layer of the tablet consists of a degradable barrier layer and the other contains the active material in a hydrophilic matrix. Inactive ingredients consist of glyceryl behenate, hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid copolymer type C, polyethylene glycols, polysorbate 80, polyvinylpyrrolidone, silicon dioxide, sodium lauryl sulfate, talc, titanium dioxide, triethyl citrate and the following colorants: D&C Red No. 30 aluminum lake (25 mg), D&C Yellow No. 10 aluminum lake (12.5 mg), FD&C Blue No. 2 aluminum lake (37.5 mg), FD&C Yellow No. 6 aluminum lake (12.5 mg), red ferric oxide (25 mg) and Yellow ferric oxide (12.5 mg and 37.5 mg).