american health packaging - Medication Listings

Imatinib is a small molecule kinase inhibitor. Imatinib mesylate film-coated tablets are supplied as 100 mg and 400 mg tablets for oral administration. Each 100 mg tablet contains 119.45 mg of imatinib mesylate equivalent to 100 mg of imatinib free base. Each 400 mg tablet contains 477.8 mg of imatinib mesylate equivalent to 400 mg of imatinib free base. Imatinib mesylate is designated chemically as 4-[(4-Methyl-‑1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]-phenyl]benzamide methanesulfonate and its structural formula is: Imatinib mesylate is an off-white to creamish yellow crystalline powder. Its molecular formula is C 29 H 31 N 7 O • CH 4 SO 3 and its molecular weight is 589.7 g/mol. Imatinib mesylate is soluble in aqueous buffers less than or equal to pH 5.5 but is very slightly soluble to insoluble in neutral/alkaline aqueous buffers. In non-aqueous solvents, the drug substance is freely soluble to very slightly soluble in dimethyl sulfoxide, methanol, and ethanol, but is insoluble in n-octanol, acetone, and acetonitrile. Inactive Ingredients: silicified microcrystalline cellulose, mannitol, copovidone, crospovidone, magnesium stearate, hypromellose, iron oxide yellow, polyethylene glycol, titanium dioxide, FD&C yellow # 6 aluminum lake and iron oxide red. Structural Formula

Indomethacin extended-release capsules are nonsteroidal anti-inflammatory drugs, available as capsules containing 75 mg of indomethacin, administered for oral use. The chemical name is 1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1H-indole-3-acetic acid. The molecular weight is 357.8. Its molecular formula is C 19 H 16 CINO 4 , and it has the following chemical structure. Indomethacin is a pale yellow to yellow-tan crystalline powder. It is practically insoluble in water and sparingly soluble in alcohol. It has a pKa of 4.5 and is stable in neutral or slightly acidic media and decomposes in strong alkali. The inactive ingredients in Indomethacin Extended-Release Capsules, 75 mg include: corn starch, D&C Yellow # 10, gelatin, mannitol, povidone, sucrose, talc, and titanium dioxide. This product complies with meets USP Drug Release Test 2 Specifications chemical structure

The active ingredient, ipratropium bromide monohydrate, USP, is an anticholinergic bronchodilator chemically described as 8-azoniabicyclo [3.2.1]- octane, 3-(3-hydroxy-1-oxo-2-phenylpropoxy)-8-methyl-8-(1-methylethyl)-, bromide, monohydrate (endo, syn)-, (±)-; a synthetic quaternary ammonium compound, chemically related to atropine. Ipratropium Bromide Monohydrate C 20 H 30 BrNO 3 •H 2 O Mol. Wt. 430.4 Ipratropium bromide is a white crystalline substance, freely soluble in water and lower alcohols. It is a quaternary ammonium compound and thus exists in an ionized state in aqueous solutions. It is relatively insoluble in non-polar media. Ipratropium Bromide Inhalation Solution is administered by oral inhalation with the aid of a nebulizer. It contains ipratropium bromide, USP 0.02% (anhydrous basis) in a sterile, preservative-free, isotonic saline solution, pH-adjusted to 3.4 (3 to 4) with hydrochloric acid. Chemical Structure

The active components in Ipratropium Bromide and Albuterol Sulfate Inhalation Solution are albuterol sulfate and ipratropium bromide. Albuterol sulfate, is a salt of racemic albuterol and a relatively selective β 2 -adrenergic bronchodilator chemically described as α 1 -[( tert -butylamino)methyl]-4-hydroxy- m -xylene-α,α'-diol sulfate (2:1) (salt). It has a molecular weight of 576.7 and the empirical formula is (C 13 H 21 NO 3 ) 2 •H 2 SO 4 . It is a white crystalline powder, soluble in water and slightly soluble in ethanol. The World Health Organization recommended name for albuterol base is salbutamol. Figure 3.1-1. Chemical structure of albuterol sulfate. Ipratropium bromide is an anticholinergic bronchodilator chemically described as 8-azoniabicyclo [3.2.1]-octane, 3-(3-hydroxy-1-oxo-2-phenylpropoxy)-8methyl-8-(1-methylethyl)-, bromide, monohydrate ( endo,syn )-, (±)-; a synthetic quaternary ammonium compound, chemically related to atropine. It has a molecular weight of 430.4 and the empirical formula is C 20 H 30 BrNO 3 •H 2 O. It is a white crystalline substance, freely soluble in water and lower alcohols, and insoluble in lipophilic solvents such as ether, chloroform, and fluorocarbons. Figure 3.1-2. Chemical structure of ipratropium bromide. Each 3 mL Sterile Unit-dose Vial contains 0.5 mg of ipratropium bromide (0.017%) and 3 mg Equivalent to 2.5 mg albuterol base albuterol sulfate (0.083%) in an isotonic, sterile, aqueous solution containing sodium chloride and 1 N hydrochloric acid to adjust to pH 4. Ipratropium Bromide and Albuterol Sulfate Inhalation Solution is a clear, colorless solution. It does not require dilution prior to administration by nebulization. For Ipratropium Bromide and Albuterol Sulfate Inhalation Solution, like all other nebulized treatments, the amount delivered to the lungs will depend on patient factors, the jet nebulizer utilized, and compressor performance. Using the Pari-LC-Plus™ nebulizer (with face mask or mouthpiece) connected to a PRONEB™ compressor system, under in vitro conditions, the mean delivered dose from the mouth piece (% nominal dose) was approximately 46% of albuterol and 42% of ipratropium bromide at a mean flow rate of 3.6 L/min. The mean nebulization time was 15 minutes or less. Ipratropium Bromide and Albuterol Sulfate Inhalation Solution should be administered from jet nebulizers at adequate flow rates, via face masks or mouthpieces (see DOSAGE AND ADMINISTRATION ). Chemical Structure Chemical Structure

Isoniazid, USP is an antibacterial available as 100 mg and 300 mg tablets for oral administration. Each tablet also contains as inactive ingredients: colloidal silicon dioxide, crospovidone, hydrogenated vegetable oil, microcrystalline cellulose, pregelatinized corn starch and talc. Isoniazid, USP is chemically known as isonicotinyl hydrazine or isonicotinic acid hydrazide. It has the following structural formula: C 6 H 7 N 3 O M.W. 137.14 Isoniazid, USP is odorless, and occurs as a colorless or white crystalline powder or as white crystals. It is freely soluble in water, sparingly soluble in alcohol and slightly soluble in chloroform and in ether. Isoniazid, USP is slowly affected by exposure to air and light. Structural Formula

Isosorbide dinitrate, an organic nitrate, is a vasodilator with effects on both arteries and veins. The chemical name for isosorbide dinitrate is 1,4:3,6-dianhydro-D-glucitol 2, 5-dinitrate. The compound has the following structural formula: C 6 H 8 N 2 O 8 MW 236.14 Isosorbide dinitrate is a white, crystalline, odorless compound which is stable in air and in solution, has a melting point of 70°C and has an optical rotation of +134° (c=1.0, alcohol, 20°C). Isosorbide dinitrate is freely soluble in organic solvents such as acetone, alcohol, and ether, but is only sparingly soluble in water. Isosorbide dinitrate tablets are available for oral administration as 5 mg, 10 mg, 20 mg, or 30 mg tablets. Each tablet contains the following inactive ingredients: lactose anhydrous, magnesium stearate, microcrystalline cellulose, sodium starch glycolate and stearic acid. In addition, the 20 mg tablet contains D&C Yellow #10, FD&C Blue #1, and FD&C Yellow #6; the 30 mg tablet contains FD&C Blue #1. Structural Formula

Isosorbide mononitrate (ISMN), an organic nitrate and the major biologically active metabolite of isosorbide dinitrate (ISDN), is a vasodilator with effects on both arteries and veins. Each tablet, for oral administration, contains either 30 mg, 60 mg or 120 mg of isosorbide mononitrate in an extended-release formulation. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, diethyl phthalate, hydrogenated castor oil, hydroxypropyl cellulose, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, talc and titanium dioxide. The molecular formula of ISMN is C 6 H 9 NO 6 and the molecular weight is 191.14. The chemical name for ISMN is 1,4:3,6-dianhydro-,D-glucitol 5-nitrate; the compound has the following structural formula: ISMN is a white, crystalline, odorless compound which is stable in air and in solution, has a melting point of about 90°C, and an optical rotation of +144° (2% in water, 20°C). Isosorbide mononitrate is freely soluble in water, ethanol, methanol, chloroform, ethyl acetate, and dichloromethane. For 30 mg: Meets USP Dissolution Test 6. For 60 mg and 120 mg: Meets USP Dissolution Test 1. Structural Formula

Itraconazole, USP is an azole antifungal agent. Itraconazole, USP is a 1:1:1:1 racemic mixture of four diastereomers (two enantiomeric pairs), each possessing three chiral centers. It may be represented by the following structural formula and nomenclature: (±)-1-[( R *)- sec -butyl]-4-[ p -[4-[ p -[[(2 R *,4 S *)-2-(2,4-dichlorophenyl)-2-(1 H -1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy] phenyl]-1-piperazinyl]phenyl]-Δ 2 -1,2,4-triazolin-5-one mixture with (±)-1-[( R *)- sec -butyl]-4-[ p -[4-[ p -[[(2 S *,4 R *)-2-(2,4-dichlorophenyl)-2-(1 H -1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]-1-piperazinyl]phenyl]-Δ 2 -1,2,4-triazolin-5-one or (±)-1-[( RS )- sec -butyl]-4-[ p -[4-[ p -[[(2 R ,4 S )-2-(2,4-dichlorophenyl)-2-(1 H -1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy] phenyl]-1-piperazinyl]phenyl]-Δ 2 -1,2,4-triazolin-5-one Itraconazole, USP has a molecular formula of C 35 H 38 Cl 2 N 8 O 4 and a molecular weight of 705.64. It is a white or almost white powder. It is insoluble in water, very slightly soluble in alcohols, and freely soluble in dichloromethane. It has a pKa of 3.70 (based on extrapolation of values obtained from methanolic solutions) and a log (n-octanol/water) partition coefficient of 5.66 at pH 8.1. Itraconazole capsules, USP contain 100 mg of itraconazole, USP coated on sugar spheres. Inactive ingredients are black iron oxide, FD&C Blue No. 1, gelatin, hypromellose, liquid glucose, microcrystalline cellulose, polyethylene glycol, potassium hydroxide, propylene glycol, shellac, sodium lauryl sulfate, starch (of maize), strong ammonia solution, sucrose and titanium dioxide. Structural Formula

Ivabradine tablets contains ivabradine as the active pharmaceutical ingredient. Ivabradine is a hyperpolarization-activated cyclic nucleotide-gated channel blocker that reduces the spontaneous pacemaker activity of the cardiac sinus node by selectively inhibiting the I f current, resulting in heart rate reduction with no effect on ventricular repolarization and no effects on myocardial contractility. The chemical name for ivabradine hydrochloride is 3-(3-{[((7 S )-3,4-Dimethoxybicyclo [4.2.0] octa-1,3,5-trien-7-yl)methyl] methyl amino} propyl) -1,3,4,5-tetrahydro-7,8-dimethoxy-2 H -3-benzazepin-2-one, hydrochloride. The molecular formula is C 27 H 36 N 2 O 5 . HCl, and the molecular weight (free base + HCl) is 505.1 (468.6 + 36.5). The chemical structure of ivabradine is shown in Figure 1. Figure 1. Chemical Structure of Ivabradine Ivabradine tablets are supplied in 5 mg and 7.5 mg tablets for oral administration. The tablets contain 5 mg and 7.5 mg of ivabradine, as the active ingredient, equivalent to 5.39 mg and 8.09 mg of ivabradine hydrochloride, respectively. Inactive Ingredients Colloidal silicon dioxide, corn starch, lactose monohydrate, magnesium stearate and maltodextrin. The film coating contains glycerin, hypromellose, magnesium stearate, polyethylene glycol, titanium dioxide. In addition, 7.5 mg contains black iron oxide, iron oxide yellow and iron oxide red. chemical structure

Ketorolac tromethamine tablets USP are a member of the pyrrolo-pyrrole group of nonsteroidal anti-inflammatory drugs (NSAIDs). The chemical name for ketorolac tromethamine, USP is (±)-5-benzoyl-2,3-dihydro-1 H -pyrrolizine-1-carboxylic acid, compound with 2-amino-2-(hydroxymethyl)-1,3-propanediol (1:1). The structural formula is: C 15 H 13 NO 3 . C 4 H 11 NO 3 M.W. 376.40 Ketorolac tromethamine, USP is a racemic mixture of [-]S and [+]R ketorolac tromethamine, USP. Ketorolac tromethamine, USP may exist in three crystal forms. All forms are equally soluble in water. Ketorolac tromethamine, USP has a pKa of 3.5 and an n-octanol/water partition coefficient of 0.26. Ketorolac tromethamine tablets USP are white, round, convex, unscored, film-coated tablets. Each tablet, for oral administration, contains 10 mg ketorolac tromethamine, USP, the active ingredient. In addition, each tablet contains the following inactive ingredients: hydroxypropyl cellulose, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polyethylene glycol, and titanium dioxide. Structural Formula

Labetalol hydrochloride tablets, USP are an adrenergic receptor blocking agent that has both selective Alpha 1 -adrenergic and nonselective beta-adrenergic receptor blocking actions in a single substance. Labetalol hydrochloride (HCl) is a racemate, chemically designated as 2-hydroxy-5-[1-hydroxy-2-[(1-methyl- 3-phenylpropyl)amino]ethyl]benzamide monohydrochloride and it has the following structure: Labetalol hydrochloride has the molecular formula C 19 H 24 N 2 O 3 •HCl and a molecular weight of 364.87. It has two asymmetric centers and therefore exists as a molecular complex of two diastereoisomeric pairs. Dilevalol, the R,R' stereoisomer, makes up 25% of racemic labetalol. Labetalol hydrochloride, USP is a white or almost white powder. It is sparingly soluble in water and in ethanol (96%), practically insoluble in ether and in methylene chloride. Labetalol hydrochloride tablet, USP for oral administration contain 100 mg, 200 mg or 300 mg labetalol hydrochloride, USP. In addition, each tablet contains the following inactive ingredients: corn starch, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, sodium starch glycolate (botanical source: potato) and titanium dioxide. Additionally, 100 mg tablets contain D&C yellow #10 Aluminum lake, iron oxide yellow, iron oxide red and talc. 300 mg tablets contain FD&C blue #1 Aluminum lake, iron oxide yellow and talc. Structural Formula

The chemical name of lacosamide, the single (R)-enantiomer, is (R)-2-acetamido-N-benzyl-3‑methoxypropionamide (IUPAC). Lacosamide is a functionalized amino acid. Its molecular formula is C 13 H 18 N 2 O 3 and its molecular weight is 250.30. The chemical structure is: Lacosamide, USP is a white to light yellow powder. It is freely soluble in methanol, soluble in anhydrous ethanol, sparingly soluble in water, slightly soluble in acetonitrile, and practically insoluble in heptane. Structural Formula 11.1 Lacosamide Tablets, USP Lacosamide tablets, USP for oral administration contain lacosamide and the following inactive ingredients: colloidal silicon dioxide, crospovidone, hydroxypropylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, talc, titanium dioxide, and dye pigments as specified below: Lacosamide tablets, USP are supplied as debossed tablets and contain the following coloring agents: 50 mg tablets: red iron oxide, black iron oxide, FD&C Blue #2/indigo carmine aluminum lake 100 mg tablets: yellow iron oxide 150 mg tablets: yellow iron oxide, red iron oxide, black iron oxide 200 mg tablets: FD&C Blue #2/indigo carmine aluminum lake FDA approved dissolution test specifications differ from USP

The chemical name of lacosamide, the single (R)-enantiomer, is (R)-2-acetamido-N-benzyl-3-methoxypropionamide (IUPAC). Lacosamide is a functionalized amino acid. Its molecular formula is C 13 H 18 N 2 O 3 and its molecular weight is 250.30. The chemical structure is: Lacosamide USP is a white to light yellow powder. It is freely soluble in methanol, soluble in anhydrous ethanol, sparingly soluble in water, slightly soluble in acetonitrile and practically insoluble in heptane. Structural Formula 11.3 Lacosamide Oral Solution, USP Lacosamide oral solution USP contains 10 mg of lacosamide USP per mL. The inactive ingredients are acesulfame potassium, carboxymethylcellulose sodium, citric acid anhydrous, glycerin, masking flavor, methylparaben, noncrystallizing sorbitol solution, polyethylene glycol, purified water, sodium chloride, strawberry flavor. The masking and strawberry flavors contain acetic acid, artificial flavors, and propylene glycol. In addition the masking flavor contains acesulfame, ammoniated glycyrrhizin, aspartame and water.

Lamivudine is a synthetic nucleoside analogue with activity against HIV-1 and HBV. The drug substance used in lamivudine tablets, USP 150 mg and 300 mg is lamivudine in the form of lamivudine methanol solvate. The chemical name of lamivudine methanol solvate is (2R,cis)-4-amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-2(1H)-pyrimidinone methanol solvate. It has a molecular formula of C 8 H 11 N 3 O 3 S·0.2CH 4 O and a molecular weight of 235.66 g/mol. It has the following structural formula: Lamivudine methanol solvate is a white to off-white powder. It is highly soluble in water. Lamivudine tablets, USP are for oral administration. Each scored 150-mg film-coated tablet contains lamivudine methanol solvate equivalent to 150 mg of lamivudine and the inactive ingredients colloidal silicon dioxide, crospovidone, hydroxypropyl cellulose, hydroxypropyl methylcellulose, lactose anhydrous, magnesium stearate, polyethylene glycol and titanium dioxide. Each 300-mg film-coated tablet contains lamivudine methanol solvate equivalent to 300 mg of lamivudine, and the inactive ingredients colloidal silicon dioxide, crospovidone, hydroxypropyl cellulose, hydroxypropyl methylcellulose, iron oxide black, lactose anhydrous, magnesium stearate, polyethylene glycol and titanium dioxide. Meets USP Dissolution Test 2. Structural Formula

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg or 150 mg or 200 mg or 250 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Each lamotrigine tablets for oral suspension, USP intended for oral administration contains 5 mg or 25 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: aspartame, croscarmellose sodium, flavour black currant, magnesium stearate, mannitol, microcrystalline cellulose, silicon dioxide and tribasic calcium phosphate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Lamotrigine Tablets for Oral Suspension, USP comply with Organic Impurities Procedure 2. Structural Formula

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg or 150 mg or 200 mg or 250 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Each lamotrigine tablets for oral suspension, USP intended for oral administration contains 5 mg or 25 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: aspartame, croscarmellose sodium, flavour black currant, magnesium stearate, mannitol, microcrystalline cellulose, silicon dioxide and tribasic calcium phosphate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Lamotrigine Tablets for Oral Suspension, USP comply with Organic Impurities Procedure 2. Structural Formula

The active ingredient in lansoprazole delayed-release capsules USP is lansoprazole USP, a substituted benzimidazole, 2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridyl] methyl] sulfinyl] benzimidazole, a compound that inhibits gastric acid secretion. Its empirical formula is C 16 H 14 F 3 N 3 O 2 S with a molecular weight of 369.37. Lansoprazole USP has the following structure: Lansoprazole USP is a white to brownish-white powder which melts with decomposition at approximately 166°C. Lansoprazole USP is freely soluble in dimethylformamide and practically insoluble in water. Lansoprazole USP is stable when exposed to light for up to two months. The rate of degradation of the compound in aqueous solution increases with decreasing pH. The degradation half-life of the drug substance in aqueous solution at 25°C is approximately 0.5 hour at pH 5.0 and approximately 18 hours at pH 7.0. Lansoprazole USP is supplied as delayed-release capsules for oral administration. The delayed-release capsules are available in two dosage strengths: 15 mg and 30 mg of lansoprazole USP per capsule. Each delayed-release capsule contains enteric-coated granules consisting of 15 mg or 30 mg of lansoprazole USP (active ingredient) and the following inactive ingredients: ammonium hydroxide, hydroxypropyl cellulose, low substituted hydroxypropyl cellulose, magnesium carbonate, methacrylic acid copolymer, polyethylene glycol, polysorbate 80, propylene glycol, shellac, simethicone, starch, sucrose, sugar spheres, talc, and titanium dioxide. Components of the gelatin capsule include gelatin, iron oxide red, iron oxide yellow, FD&C Blue 2, sodium lauryl sulphate and titanium dioxide for 15 mg capsules and gelatin, iron oxide black, iron oxide red, iron oxide yellow, sodium lauryl sulphate and titanium dioxide for 30 mg capsules. Structural Formula

Leucovorin Calcium Tablets USP contain either 5 mg or 25 mg leucovorin as the calcium salt of N -[4-[[(2-amino-5-formyl-1,4,5,6,7,8-hexahydro-4-oxo-6-pteridinyl)methyl] amino]benzoyl]- L -glutamic acid. This is equivalent to 5.4 mg or 27.01 mg of anhydrous leucovorin calcium, respectively. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, lactose monohydrate, magnesium stearate, and microcrystalline cellulose. The 25 mg tablet also contains D&C yellow no. 10 aluminum lake and FD&C blue no. 1 aluminum lake. Leucovorin is a water soluble form of reduced folate in the folate group; it is useful as an antidote to drugs which act as folic acid antagonists. These tablets are intended for oral administration only. The structural formula is as follows: C 20 H 21 CaN 7 O 7 M.W. 511.5 Structural Formula

Levetiracetam is an antiepileptic drug available as a clear, colorless, grape-flavored liquid (100 mg/mL) for oral administration. The chemical name of levetiracetam, a single enantiomer, is (-)-(S)-α-ethyl-2-oxo-1-pyrrolidine acetamide, its molecular formula is C 8 H 14 N 2 O 2 and its molecular weight is 170.21. Levetiracetam is chemically unrelated to existing antiepileptic drugs (AEDs). It has the following structural formula: Levetiracetam, USP is a white to off-white crystalline powder with a faint odor and a bitter taste. It is very soluble in water (1,040 mg/mL). It is freely soluble in chloroform (653 mg/mL) and in methanol (536 mg/mL), soluble in ethanol (165 mg/mL), sparingly soluble in acetonitrile (57 mg/mL) and practically insoluble in n-hexane. (Solubility limits are expressed as mg/mL solvent.) Levetiracetam oral solution, USP contains 100 mg of levetiracetam, USP per mL. Inactive ingredients: acesulfame potassium, artificial grape flavor, citric acid monohydrate, glycerin, glycyrrhizate ammonium, maltitol solution, methyl paraben, propyl paraben, purified water and sodium citrate dihydrate. Structural Formula

Levetiracetam is an antiepileptic drug available as 250 mg (blue), 500 mg (yellow), 750 mg (orange), and 1000 mg (white to off-white) tablets for oral administration. The chemical name of levetiracetam, a single enantiomer, is (-)-(S)-α-ethyl-2-oxo-1-pyrrolidine acetamide, its molecular formula is C 8 H 14 N 2 O 2 and its molecular weight is 170.21. Levetiracetam is chemically unrelated to existing antiepileptic drugs (AEDs). It has the following structural formula: Levetiracetam USP is a white to off-white, crystalline powder with a faint odor and a bitter taste. It is very soluble in water (104 g/100 mL). It is freely soluble in chloroform (65.3 g/100 mL) and in methanol (53.6 g/100 mL), soluble in ethanol (16.5 g/100 mL), sparingly soluble in acetonitrile (5.7 g/100 mL) and practically insoluble in n-hexane. (Solubility limits are expressed as g/100 mL solvent.) Levetiracetam tablets USP contain the labeled amount of levetiracetam. Inactive ingredients: corn starch, colloidal silicon dioxide, povidone, talc, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol, and purified water. In addition 250 mg contains FD&C Blue #2/indigo carmine aluminum lake, 500 mg contains iron oxide yellow, and 750 mg contains FD&C Yellow #6/sunset yellow FCF aluminum lake, FD&C Blue #2/indigo carmine aluminum lake, and iron oxide red. Meets USP dissolution test 2. Structural Formula

Levetiracetam is an antiepileptic drug available as 250 mg (blue), 500 mg (yellow), 750 mg (orange), and 1000 mg (white to off-white) tablets for oral administration. The chemical name of levetiracetam, a single enantiomer, is (-)-(S)-α-ethyl-2-oxo-1-pyrrolidine acetamide, its molecular formula is C 8 H 14 N 2 O 2 and its molecular weight is 170.21. Levetiracetam is chemically unrelated to existing antiepileptic drugs (AEDs). It has the following structural formula: Levetiracetam USP is a white to off-white, crystalline powder with a faint odor and a bitter taste. It is very soluble in water (104 g/100 mL). It is freely soluble in chloroform (65.3 g/100 mL) and in methanol (53.6 g/100 mL), soluble in ethanol (16.5 g/100 mL), sparingly soluble in acetonitrile (5.7 g/100 mL) and practically insoluble in n-hexane. (Solubility limits are expressed as g/100 mL solvent.) Levetiracetam tablets USP contain the labeled amount of levetiracetam. Inactive ingredients: corn starch, colloidal silicon dioxide, povidone, talc, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol, and purified water. In addition 250 mg contains FD&C Blue #2/indigo carmine aluminum lake, 500 mg contains iron oxide yellow, and 750 mg contains FD&C Yellow #6/sunset yellow FCF aluminum lake, FD&C Blue #2/indigo carmine aluminum lake, and iron oxide red. Meets USP dissolution test 2. Chemical Structure

Lidocaine Hydrochloride Oral Topical Solution USP, 2% (Viscous) contains a local anesthetic agent and is administered topically. Lidocaine Hydrochloride Oral Topical Solution USP, 2% (Viscous) contains lidocaine hydrochloride, which is chemically designated as acetamide, 2-(diethylamino)-N-(2,6-dimethylphenyl)-, monohydrochloride and has the following structural formula: The molecular formula of lidocaine is C 14 H 22 N 2 O. The molecular weight is 234.34. Chemical Structure

Linezolid tablets contain linezolid, which is a synthetic antibacterial agent of the oxazolidinone class. The chemical name for linezolid is (N-[[(5S)-3-[3-Fluoro-4-(4-morpholinyl) phenyl]-2-oxo-5-oxazolidinyl]methyl] acetamide. The empirical formula is C 16 H 20 FN 3 O 4 . Its molecular weight is 337.35, and its chemical structure is represented below: Linezolid tablets for oral administration contain 600 mg linezolid as film-coated tablets. Inactive ingredients are carnauba wax, colloidal silicon dioxide, hypromellose, lactose monohydrate, magnesium stearate, polacrilin potassium, polyethylene glycol and titanium dioxide. Structural Formula

Linezolid for Oral Suspension contain linezolid USP, which is a synthetic antibacterial agent of the oxazolidinone class. The chemical name for linezolid is (S)-N-[[3-[3-Fluoro-4-(4 morpholinyl) phenyl]-2-oxo- 5-oxazolidinyl] methyl]-acetamide. The empirical formula is C 16 H 20 FN 3 O 4 . Its molecular weight is 337.35, and its chemical structure is represented below: Linezolid for Oral Suspension is supplied as white or off white to brown granule/powder for constitution into a suspension for oral administration. Following constitution, each 5 mL contains 100 mg of linezolid. Inactive ingredients are anhydrous citric acid powder, aspartame, carboxymethylcellulose sodium, colloidal silicon dioxide, glycyrrhizinate ammonium, hypromellose, mannitol, microcrystalline cellulose, sodium benzoate, sodium chloride, sucrose, trisodium citrate dihydrate, xanthan gum, and flavors [see Patient Counseling Information (17) ]. The sodium (Na + ) content is 8.18 mg/5 mL. Structural Formula

Lisdexamfetamine dimesylate, a CNS stimulant, is for once-a-day oral administration. The chemical designation for lisdexamfetamine dimesylate is (2S)-2,6-diamino- N -[(1S)-1-methyl-2-phenylethyl] hexanamide dimethanesulfonate. The molecular formula is C 17 H 33 N 3 O 7 S 2 , which corresponds to a molecular weight of 455.59. The chemical structure is: Lisdexamfetamine dimesylate is a white to off-white powder that is soluble in water (986 mg/mL). Lisdexamfetamine dimesylate capsules contain 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg and 70 mg of lisdexamfetamine dimesylate (equivalent to 5.8 mg, 11.6 mg, 17.3 mg, 23.1 mg, 28.9 mg, 34.7 mg, and 40.5 mg of lisdexamfetamine). Inactive ingredients: Microcrystalline cellulose, croscarmellose sodium, magnesium stearate, gelatin, titanium dioxide and sodium lauryl sulfate. The ink ingredients common for all strengths are shellac, propylene glycol, strong ammonia solution, black iron oxide and potassium hydroxide. Each strength capsule also contains colorant ingredients in the capsule shell as follows: 10 mg: FD&C Red No. 3 20 mg: Iron Oxide Yellow 30 mg: FD&C Red No. 3 and FD&C Yellow No. 6 40 mg: FD&C Red No. 3 and FD&C Blue No. 1 50 mg: FD&C Red No. 3 and FD&C Blue No. 1 60 mg: FD&C Red No. 3 and FD&C Blue No. 1 70 mg: FD&C Blue No. 1 and D&C Red 28 structure

Each capsule for oral administration contains lithium carbonate, USP 150 mg, 300 mg or 600 mg and the following inactive ingredients: colloidal silicon dioxide, gelatin, sodium lauryl sulfate, talc, titanium dioxide, FD&C Blue No. 1, FD&C Red No. 40, D&C Yellow No. 10, and the imprinting ink contains shellac, propylene glycol, potassium hydroxide, and black iron oxide. Lithium is an element of the alkali-metal group with atomic number 3, atomic weight 6.94, and an emission line at 671 nm on the flame photometer. Lithium Carbonate, USP is a white, crystalline powder with molecular formula Li 2 CO 3 and molecular weight 73.89.

Lithium Carbonate Extended-release Tablets, USP contain lithium carbonate, USP, a white granular powder with molecular formula Li 2 CO 3 and molecular weight 73.89. Lithium is an element of the alkali-metal group with atomic number 3, atomic weight 6.94 and an emission line at 671 nm on the flame photometer. Lithium Carbonate Extended-release Tablets USP are available for oral administration containing 300 mg of lithium carbonate USP. This slowly dissolving, film-coated tablet is designed to give lower serum lithium peak concentrations than obtained with conventional oral lithium dosage forms. Each tablet contains the following inactive ingredients: calcium stearate, Opadry II (Beige), povidone, sodium chloride, sodium lauryl sulfate, and sorbitol. Opadry II (Beige) contains: hypromellose, polydextrose, polyethylene glycol, red iron oxide, titanium dioxide, triacetin, and yellow iron oxide. The tablets meet the requirements of USP Dissolution Test 5 in the USP monograph for Lithium Carbonate Extended-release Tablets USP, 300 mg.

Lithium Carbonate Extended-Release Tablets USP contain lithium carbonate USP, a white, light alkaline powder with molecular formula Li 2 CO 3 and molecular weight 73.89. Lithium is an element of the alkali-metal group with atomic number 3, atomic weight 6.94 and an emission line at 671 nm on the flame photometer. The tablets meet the requirements of USP Dissolution Test 2 in the USP monograph for Lithium Carbonate Extended-release Tablets, USP. Lithium Carbonate Extended-Release Tablets: Each speckled, off-white to yellow, round biconvex tablet, debossed with “54 346” on one side and scored on the other side, contains lithium carbonate, 450 mg. Inactive ingredients consist of iron oxide (yellow), magnesium stearate, povidone, sodium alginate and sodium starch glycolate. Lithium Carbonate Extended-Release Tablets USP, 450 mg are designed to release a portion of the dose initially and the remainder gradually; the release pattern of the controlled release tablets reduces the variability in lithium blood levels seen with the immediate release dosage forms.

Loperamide hydrochloride is a white to slightly yellow powder and is freely soluble in methanol, isopropyl alcohol, chloroform and slightly soluble in water. Loperamide hydrochloride, 4-(p-chlorophenyl)-4-hydroxy-N,N-dimethyl-α,α-diphenyl-1-piperidinebutyramide monohydrochloride, is a synthetic antidiarrheal for oral use. Its structural formula is: C 29 H 33 ClN 2 O 2 •HCl M.W. 513.51 Loperamide hydrochloride is available in 2 mg capsules. The inactive ingredients: dimethylpolysiloxane, gelatin, iron oxide black, iron oxide red, iron oxide yellow, lactose monohydrate, pregelatinized corn starch, magnesium stearate, shellac, and titanium dioxide. Structural formula for loperaminde hydrochloride

Uses temporarily relieves these symptoms due to hay fever or other upper respiratory allergies: itching of the nose or throat runny nose itchy, watery eyes sneezing

Lorazepam USP, an antianxiety agent, has the chemical formula, 7-chloro-5-( o -chlorophenyl)-1,3‑-dihydro-3-hydroxy-2 H -1,4-benzodiazepin-2-one: It is a nearly white powder almost insoluble in water. Each lorazepam tablet, USP to be taken orally, contains 0.5 mg, 1 mg, or 2 mg of lorazepam, USP. The inactive ingredients present are anhydrous lactose, magnesium stearate, microcrystalline cellulose, and polacrilin potassium. Structural Formula

Lubiprostone is a chloride channel activator for oral use. The chemical name for lubiprostone is (–)-7-[(2 R ,4a R ,5 R ,7a R )-2-(1,1-difluoropentyl)-2-hydroxy-6-oxooctahydrocyclopenta[ b ]pyran-5-yl]heptanoic acid. The molecular formula of lubiprostone is C 20 H 32 F 2 O 5 with a molecular weight of 390.47 and a chemical structure as follows: Lubiprostone drug substance occurs as off-white to white crystalline powder, is very soluble in ether and ethanol, and is practically insoluble in hexane and water. Lubiprostone capsules are available as imprinted, oval, soft gelatin capsules in two strengths. Pink capsules contain 8 mcg of lubiprostone and the following inactive ingredients: black iron oxide, ferric oxide red, gelatin, hypromellose, lecithin, medium-chain triglycerides, propylene glycol, purified water, sorbitol sorbitan solution, and titanium dioxide. Orange capsules contain 24 mcg of lubiprostone and the following inactive ingredients: black iron oxide, D&C Yellow No. 10, FD&C Red No. 40, gelatin, hypromellose, lecithin, medium-chain triglycerides, propylene glycol, purified water, and sorbitol sorbitan solution. 1

Lurasidone hydrochloride tablets are atypical antipsychotic belonging to the chemical class of benzisothiazol derivatives. Its chemical name is (3a R ,4 S , 7 R , 7a S )-2-{(1 R ,2 R )-2-[ 4-(1,2-Benzisothiazol-3-yl)-1-piperazinyl] methyl] cyclohexyl methyl}hexahydro-4, 7-methano-1 H -isoindole-1, 3 (2 H )-dione hydrochloride. Its molecular formula is C 28 H 36 N 4 O 2 S·HCl and its molecular weight is 529.14. The chemical structure is: Lurasidone hydrochloride is a white to off-white powder. It is very slightly soluble in water, practically insoluble or insoluble in 0.1 N HCl, slightly soluble in ethanol, sparingly soluble in methanol, practically insoluble or insoluble in toluene and very slightly soluble in acetone. Lurasidone hydrochloride tablets are intended for oral administration only. Each tablet contains 20 mg, 40 mg, 60 mg, 80 mg, or 120 mg of lurasidone hydrochloride. Inactive ingredients are mannitol, lactose monohydrate, pregelatinized starch, croscarmellose sodium, povidone, anhydrous citric acid, magnesium stearate, hypromellose, titanium dioxide and Polyethylene glycol. Additionally, the 80 mg tablet contains yellow ferric oxide and FD&C Blue No. 1 Aluminum Lake. Structural Formula

Meclizine hydrochloride, a histamine (H1) receptor antagonist, is a white or slightly yellowish, crystalline powder. Its molecular formula is C 25 H 27 ClN 2 •2HCl•H 2 O and its molecular weight is 481.88. It has the following structural formula: Chemically, meclizine hydrochloride is 1-( p -chloro-α-phenylbenzyl)-4-( m -methylbenzyl) piperazine dihydrochloride monohydrate. Each meclizine hydrochloride 12.5 mg tablet contains 12.5 mg of meclizine dihydrochloride equivalent to 10.53 mg of meclizine free base. Each meclizine hydrochloride 25 mg tablet contains 25 mg of meclizine dihydrochloride equivalent to 21.07 mg of meclizine free base. Inactive ingredients for the tablets are: colloidal silicon dioxide, lactose monohydrate, magnesium stearate, microcrystalline cellulose, sodium starch glycolate and talc. The 12.5 mg tablets also contain FD&C Blue #1 Aluminum Lake. The 25 mg tablets also contain D&C Yellow #10 Aluminum Lake. Structural Formula

Medroxyprogesterone acetate tablets, USP contain medroxyprogesterone acetate, USP which is a derivative of progesterone. It is a white to off-white, odorless crystalline powder, stable in air, melting between 200 and 210°C. It is freely soluble in chloroform, soluble in acetone and in dioxane, sparingly soluble in alcohol and in methanol, slightly soluble in ether, and insoluble in water. The chemical name for medroxyprogesterone acetate is pregn-4-ene-3, 20-dione, 17-(acetyloxy)-6-methyl-, (6α)-. The structural formula is: Each tablet, for oral administration, contains 2.5 mg, 5 mg or 10 mg of medroxyprogesterone acetate, USP and the following inactive ingredients: crospovidone, lactose monohydrate, magnesium stearate, methylcellulose, pregelatinized corn starch, and sodium lauryl sulfate. Structural Formula

Megestrol Acetate Oral Suspension, USP contains megestrol acetate, a synthetic derivative of the steroid hormone, progesterone. Megestrol acetate is a white, crystalline solid chemically designated as 17-Hydroxy-6-methylpregna-4,6-diene-3,20-dione acetate. Solubility at 37°C in water is 2 mcg per mL, solubility in plasma is 24 mcg per mL. Its molecular weight is 384.52. The chemical formula is C 24 H 32 O 4 and the structural formula is represented as follows: Megestrol acetate oral suspension is supplied as an oral suspension containing 40 mg of micronized megestrol acetate per mL. Megestrol acetate oral suspension contains the following inactive ingredients: citric acid, lemon-lime flavor (propylene glycol, ethyl alcohol, natural flavor), propylene glycol, purified water, sodium benzoate, sodium citrate, sucrose and xanthan gum. Image 1

Memantine hydrochloride is an orally active NMDA receptor antagonist. The chemical name for memantine hydrochloride is 1-amino-3,5-dimethyladamantane hydrochloride with the following structural formula: The molecular formula is C 12 H 21 N•HCl and the molecular weight is 215.76. Memantine hydrochloride, USP occurs as a white to off-white colored powder and is slightly soluble in water. Memantine hydrochloride tablets are available for oral administration as capsule-shaped, film-coated tablets containing 5 mg and 10 mg of memantine hydrochloride. The tablets also contain the following inactive ingredients: colloidal silicon dioxide, corn starch, lactose monohydrate, magnesium stearate, povidone and talc. In addition the following inactive ingredients are also present as components of the film coat: hypromellose, polyethylene glycol, titanium dioxide, FD & C Yellow #6 and FD & C blue #2 (5 mg tablets), black iron oxide (10 mg tablets). Memantine HCl Structural Formula

Each mesalamine delayed-release tablet for oral administration contains 800 mg of mesalamine USP, an aminosalicylate. Mesalamine, USP is light tan to pink colored, needle-shaped crystals. Color may darken on exposure to air. It is odorless or may have a slight characteristic odor, slightly soluble in water; very slightly soluble in methanol, in dehydrated alcohol, and in acetone; practically insoluble in n -butyl alcohol, in chloroform, in ether, in ethyl acetate, in n -hexane, in methylene chloride, and in n -propyl alcohol and soluble in dilute hydrochloric acid and in dilute alkali hydroxides. Mesalamine delayed-release tablets 800 mg have single layered coating consisting of an acrylic based resin Eudragit S (methacrylic acid copolymer B, NF), which dissolves at pH 7 or greater, releasing mesalamine for topical anti-inflammatory action in the colon. Mesalamine (also referred to as 5-aminosalicylic acid or 5-ASA) has the chemical name 5-amino-2-hydroxybenzoic acid and its structural formula is: Each mesalamine delayed-release tablet contains 800 mg of mesalamine. In addition, each tablet contains the following inactive ingredients: acetyltributyl citrate, colloidal silicone dioxide, ferric oxide red, magnesium stearate, methacrylic acid copolymer type B, microcrystalline cellulose, povidone, sodium starch glycolate, talc and titanium dioxide. The tablet is printed with opacode black S-1-17823 which contains following ingredients: ammonium hydroxide, butyl alcohol, ferrosoferric oxide, isopropyl alcohol, propylene glycol and shellac. Structural Formula

Each Mesalamine delayed-release capsule for oral administration contains four 100 mg tablets of mesalamine, an aminosalicylate. Mesalamine delayed-release capsules contain acrylic based resin, methacrylic acid copolymer (Eudragit S), which dissolves at pH 7 or greater and releases mesalamine in the terminal ileum and beyond for topical anti-inflammatory action in the colon. Mesalamine, USP (also referred to as 5-aminosalicylic acid or 5-ASA) has the chemical name 5-amino-2-hydroxybenzoic acid. Its structural formula is: C 7 H 7 NO 3 M.W. 153.14 Inactive Ingredients: Each capsule contains colloidal silicon dioxide, dibutyl sebacate, hypromellose, iron oxide black, iron oxide red, lactose monohydrate, magnesium stearate, methacrylic acid copolymer, polyethylene glycol, potassium hydroxide, povidone, propylene glycol, shellac, sodium starch glycolate (potato), and talc. Structural formula

Each mesalamine extended-release capsule is a delayed-and extended-release dosage form for oral administration. Each capsule contains 0.375 g of mesalamine USP (5-aminosalicylic acid, 5-ASA), an aminosalicylate. The structural formula of mesalamine is: Molecular Weight: 153.14 Molecular Formula: C 7 H 7 NO 3 Each mesalamine extended-release capsules, USP contains granules composed of mesalamine in a polymer matrix with an enteric coating that dissolves at pH 6 and above. The inactive ingredients of mesalamine extended-release capsules USP are black iron oxide, colloidal silicon dioxide, edible black ink which contains shellac, ethyl acrylate and methyl methacrylate copolymer, FD and C Blue # 1, FD and C Red # 3, gelatin, hypromellose, magnesium stearate, methacrylic acid and methyl methacrylate copolymer, microcrystalline cellulose, polyethylene glycol, potassium hydroxide, propylene glycol, sodium lauryl sulphate, talc, titanium dioxide, triethyl citrate, vanillin. FDA approved dissolution test specifications differ from USP acceptance criteria Structural Formula

Each mesalamine delayed-release tablet for oral administration contains 1.2 g 5-aminosalicylic acid (5-ASA; mesalamine), an anti-inflammatory agent. Mesalamine also has the chemical name 5-amino-2-hydroxybenzoic acid and its structural formula is: Molecular formula: C 7 H 7 NO 3 Molecular weight: 153.14 Mesalamine, USP is a light tan to pink colored, needle-shaped crystals. Color may darken on exposure to air. It is odorless or may have a slight characteristic odor. The tablet is coated with a pH dependent polymer film, which breaks down at or above pH 6.8, normally in the terminal ileum where mesalamine then begins to be released from the tablet core. The tablet core contains mesalamine with hydrophilic excipients and provides for extended release of mesalamine. Each mesalamine delayed-release tablet, USP intended for oral administration contains 1.2 g of mesalamine. In addition, each tablet contains the following inactive ingredients: carboxymethylcellulose sodium, colloidal silicon dioxide, hypromellose, iron oxide red, iron oxide yellow, magnesium stearate, methacrylic acid copolymer, microcrystalline cellulose, polyethylene glycol, sodium starch glycolate, triethyl citrate, talc and titanium dioxide. The Product meets USP Dissolution Test 4. Structural Formula

Metaxalone Tablets, USP are available as an 800 mg, capsule shaped, scored pink tablet. Chemically, metaxalone, USP is 5-[(3,5-dimethylphenoxy)methyl]-2-oxazolidinone. The empirical formula is C 12 H 15 NO 3 , which corresponds to a molecular weight of 221.25. The structural formula is: Metaxalone, USP is a white to almost white, crystalline powder freely soluble in dichloromethane, soluble in methanol, sparingly soluble in ethanol and ethyl acetate, slightly soluble in toluene and isopropanol, insoluble in water and n -hexane. Each tablet contains 800 mg metaxalone, USP and the following inactive ingredients: alginic acid, corn starch, ferric oxide red, copovidone, magnesium stearate, povidone, pregelatinized starch, sodium alginate. Structural Formula

Methadone hydrochloride is chemically described as 6-(dimethylamino)-4,4-diphenyl-3-hepatanone hydrochloride. Methadone hydrochloride USP is a white powder that is water-soluble. Its molecular formula is C 21 H 27 NO• HCl and it has a molecular weight of 345.91. Methadone hydrochloride has a melting point of 235°C, and a pKa of 8.25 in water at 20°C. Its octanol/water partition coefficient at pH 7.4 is 117. A solution (1:100) in water has a pH between 4.5 and 6.5. It has the following structural formula: Each 5 mL of Methadone Hydrochloride Oral Solution contains 5 mg or 10 mg of methadone hydrochloride USP and the following inactive ingredients: alcohol (8%), benzoic acid, citric acid, FD&C Red #40, FD&C Yellow #6, flavoring (lemon), glycerin, sorbitol, and water. methadone-hcl-chem-structure.jpg

Each white to off-white capsule-shaped tablet contains 1 g Methenamine Hippurate USP which is the Hippuric Acid Salt of Methenamine (hexamethylene tetramine). The tablet also contains inactive ingredients Colloidal silicon dioxide, magnesium stearate and povidone K90.

Methimazole (1-methylimidazole-2-thiol) is a white, crystalline substance that is freely soluble in water. It differs chemically from the drugs of the thiouracil series primarily because it has a 5- instead of a 6-membered ring. Methimazole tablet, USP contains 5 or 10 mg (43.8 or 87.6 μmol) methimazole, an orally administered antithyroid drug. Each tablet also contains lactose monohydrate, magnesium stearate, corn starch, and talc. The molecular weight is 114.17, and the molecular formula is C 4 H 6 N 2 S. The structural formula is as follows: Structural Formula

Methocarbamol tablets USP a carbamate derivative of guaifenesin, is a central nervous system (CNS) depressant with sedative and musculoskeletal relaxant properties. The chemical name of methocarbamol is 3-(2-methoxyphenoxy)-1,2-propanediol 1-carbamate and has the empirical formula C 11 H 15 NO 5 . Its molecular weight is 241.24. The structural formula is shown below. Methocarbamol is a white powder, sparingly soluble in water and chloroform, soluble in alcohol (only with heating) and propylene glycol, and insoluble in benzene and n-hexane. Methocarbamol tablets USP are available as 500 mg and 750 mg tablets for oral administration. Methocarbamol tablets USP 500 mg and 750 mg contain the following inactive ingredients: sodium lauryl sulfate, sodium starch glycolate, povidone K 90, polyethylene glycol, magnesium stearate, colloidal silicon dioxide, low substituted hydroxypropyl cellulose and stearic acid. structure.jpg

Methylergonovine Maleate Tablets, USP is a semi-synthetic ergot alkaloid used for the prevention and control of postpartum hemorrhage. Methylergonovine Maleate Tablets, USP is available in tablets for oral ingestion containing 0.2 mg methylergonovine maleate. Tablets Active ingredient: Methylergonovine maleate, USP, 0.2 mg. Inactive ingredients: acacia, corn starch, gelatin, lactose monohydrate, methylparaben, microcrystalline cellulose, povidone, propylparaben, stearic acid, and tartaric acid. Chemically, methylergonovine maleate is designated as ergoline-8-carboxamide, 9,10-didehydro-N-[1-(hydroxymethyl) propyl]-6-methyl-,[8β(S)]-,(Z)-2-butenedioate(1:1) (salt). Its structural formula is: Structural Formula

Methylphenidate hydrochloride tablets contain methylphenidate hydrochloride, a CNS stimulant. They are available as tablets of 5 mg, 10 mg, and 20 mg strengths for oral administration. Methylphenidate hydrochloride is methyl α-phenyl-2-piperidineacetate hydrochloride, and its structural formula is: Methylphenidate hydrochloride USP is a white, odorless, fine crystalline powder. Its solutions are acid to litmus. It is freely soluble in water and in methanol, soluble in alcohol, and slightly soluble in chloroform and in acetone. Its molecular weight is 269.77 g/mol. Methylphenidate hydrochloride tablets contain the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, and talc. Note: Methylphenidate hydrochloride tablets are color-additive free. Chemical Structure

Methylphenidate hydrochloride extended-release tablets, USP is a central nervous system (CNS) stimulant. Methylphenidate hydrochloride extended-release tablets are available in four tablet strengths. Each extended-release tablet for once-a-day oral administration contains 18, 27, 36, or 54 mg of methylphenidate HCl USP and is designed to have a 12-hour duration of effect. Chemically, methylphenidate HCl is d, l (racemic) methyl α-phenyl-2-piperidineacetate hydrochloride. Its empirical formula is C 14 H 19 NO 2 •HCl. Its structural formula is: Methylphenidate HCl USP is a white to off-white crystalline powder. Its solutions are acid to litmus. It is freely soluble in water and in methanol, soluble in alcohol, and slightly soluble in chloroform and in acetone. Its molecular weight is 269.77. Methylphenidate hydrochloride extended-release tablets, USP also contains the following inert ingredients and are common to all strengths: butylated hydroxytoluene, cellulose acetate, hypromellose, phosphoric acid, polyethylene glycol, polyethylene oxides, povidone, propylene glycol, sodium chloride, stearic acid, succinic acid, ferric oxide yellow, FD&C Red No 40 and titanium dioxide. The 18 mg tablet strength also contains iron oxide yellow and Polysorbate 80. The 27 mg tablet strength also contains iron oxide red. The 36 mg tablet strength also contains talc. The 54 mg tablet strength also contains iron oxide yellow, iron oxide red and talc. Each tablet strength also contains black iron oxide, hypromellose and propylene glycol as imprinting ink. USP Dissolution Test Pending. Structural Formula 11.1 System Components and Performance Methylphenidate hydrochloride extended-release tablets uses osmotic pressure to deliver methylphenidate HCl at a controlled rate. The system, which resembles a conventional tablet in appearance, comprises an osmotically active trilayer core surrounded by a semipermeable membrane with an immediate-release drug overcoat. The trilayer core is composed of two drug layers containing the drug and excipients, and a push layer containing osmotically active components. There is a precision-laser drilled orifice on the drug-layer end of the tablet. In an aqueous environment, such as the gastrointestinal tract, the drug overcoat dissolves within one hour, providing an initial dose of methylphenidate. Water permeates through the membrane into the tablet core. As the osmotically active polymer excipients expand, methylphenidate is released through the orifice. The membrane controls the rate at which water enters the tablet core, which in turn controls drug delivery. Furthermore, the drug release rate from the system increases with time over a period of 6 to 7 hours due to the drug-concentration gradient incorporated into the two drug layers of methylphenidate hydrochloride extended-release tablets. The biologically inert components of the tablet remain intact during gastrointestinal transit and are eliminated in the stool as a tablet shell along with insoluble core components. It is possible that methylphenidate hydrochloride extended-release tablets may be visible on abdominal x-rays under certain circumstances, especially when digital enhancing techniques are utilized.

Methylprednisolone tablets, USP contain methylprednisolone, USP which is a glucocorticoid. Glucocorticoids are adrenocortical steroids, both naturally occurring and synthetic, which are readily absorbed from the gastrointestinal tract. Methylprednisolone, USP occurs as a white to practically white, crystalline powder. It is sparingly soluble in alcohol, in dioxane, and in methanol, slightly soluble in acetone, and in chloroform, and very slightly soluble in ether. It is practically insoluble in water. The chemical name for methylprednisolone, USP is pregna-1,4-diene-3,20-dione,11,17,21-trihydroxy-6-methyl-,(6α,11β)-, and the molecular weight is 374.48. The structural formula is represented below: Each methylprednisolone tablet, USP for oral administration contains 4 mg of methylprednisolone, USP. Inactive ingredients: magnesium stearate, microcrystalline cellulose and sodium starch glycolate. Structural Formula of Methylprednisolone