northstar rxllc - Medication Listings

Sapropterin dihydrochloride is an orally administered Phenylalanine Hydroxylase activator (or PAH activator). Sapropterin dihydrochloride, the active pharmaceutical ingredient in sapropterin dihydrochloride powder for oral solution, is a synthetic preparation of the dihydrochloride salt of naturally occurring tetrahydrobiopterin (BH4). Sapropterin dihydrochloride is a white to pale yellow color powder. The chemical name of sapropterin dihydrochloride is (6R)-2-amino-6-[(1R,2S)-1,2-dihydroxypropyl]-5,6,7,8-tetrahydro-4(1H)-pteridinone dihydrochloride and the molecular formula is C 9 H 15 N 5 O 3 ·2HCl with a molecular weight of 314.17. Sapropterin dihydrochloride has the following structural formula: Sapropterin dihydrochloride is supplied as powder for oral solution containing 100 mg of sapropterin dihydrochloride (equivalent to 76.8 mg of sapropterin base). Sapropterin dihydrochloride is also supplied as powder for oral solution containing 500 mg of sapropterin dihydrochloride (equivalent to 384 mg of sapropterin base). Sapropterin dihydrochloride powder for oral solution is off-white to yellow in color. Each unit dose packet contains the following inactive ingredients: ascorbic acid, mannitol, potassium citrate monohydrate and sucralose. sapropretinepfossructure

Sapropterin dihydrochloride is an orally administered Phenylalanine Hydroxylase activator (or PAH activator). Sapropterin dihydrochloride, the active pharmaceutical ingredient in sapropterin dihydrochloride tablet, is a synthetic preparation of the dihydrochloride salt of naturally occurring tetrahydrobiopterin (BH4). Sapropterin dihydrochloride is a white to pale yellow color powder. The chemical name of sapropterin dihydrochloride is (6R)-2-amino-6-[(1R,2S)-1,2dihydroxypropyl]-5,6,7,8-tetrahydro-4(1H)-pteridinone dihydrochloride and the molecular formula is C 9 H 15 N 5 O 3 ·2HCl with a molecular weight of 314.17. Sapropterin dihydrochloride has the following structural formula: Sapropterin dihydrochloride is supplied as tablets containing 100 mg of sapropterin dihydrochloride (equivalent to 76.8 mg of sapropterin base). Tablets are off-white to light yellow mottled round, tablets debossed with “I 1”. Each tablet contains the following inactive ingredients: ascorbic acid, colloidal silicon dioxide, crospovidone, mannitol, riboflavin and sodium stearyl fumarate. sapropterindihydrochloridetabletsstructure

The active ingredient in sevelamer carbonate for oral suspension is sevelamer carbonate, a polymeric amine that binds phosphate and is meant for oral administration. It was developed as a pharmaceutical alternative to sevelamer hydrochloride. Sevelamer carbonate is an anion exchange resin, with the same polymeric structure as sevelamer hydrochloride, in which carbonate replaces chloride as the counterion. While the counterions differ for the two salts, the polymer itself, the active moiety involved in phosphate-binding, is the same. Sevelamer carbonate is known chemically as poly(allylamine-co-N,N’-diallyl-1,3-diamino-2-hydroxypropane) carbonate salt. Sevelamer carbonate is hygroscopic, but insoluble in water. The structure is represented in Figure 1. Figure 1: Chemical Structure of Sevelamer Carbonate a, b = number of primary amine groups a + b = 9 c = number of cross-linking groups c = 1 m = large number to indicate extended polymer network Sevelamer Carbonate Powder: Each packet of sevelamer carbonate for oral suspension contains 0.8 g of sevelamer carbonate on an anhydrous basis. The inactive ingredients are mannitol, ferric oxide yellow, povidone k-30, xanthan gum, sodium chloride, sucralose, orange flavor permaseal phs-133147, vanilla flavor 78506-32 and lemon juice flavor phs-221397. str

The active ingredient in Sevelamer Hydrochloride Tablets is sevelamer hydrochloride, a polymeric amine that binds phosphate and is meant for oral administration. Sevelamer hydrochloride is poly(allylamine hydrochloride) crosslinked with epichlorohydrin in which 40% of the amines are protonated. It is known chemically as poly(allylamine- co -N,N'-diallyl-1,3-diamino-2-hydroxypropane) hydrochloride. Sevelamer hydrochloride is hydrophilic, but insoluble in water. The structure is represented in Figure 1. Figure 1: Chemical Structure of Sevelamer Hydrochloride a, b = number of primary amine groups a + b = 9 c = number of crosslinking groups c = 1 n = fraction of protonated amines n = 0.4 m = large number to indicate extended polymer network The primary amine groups shown in the structure are derived directly from poly(allylamine hydrochloride). The crosslinking groups consist of two secondary amine groups derived from poly(allylamine hydrochloride) and one molecule of epichlorohydrin. Sevelamer Hydrochloride Tablets: Each film-coated tablet of sevelamer hydrochloride contains 800 mg of sevelamer hydrochloride on an anhydrous basis. The inactive ingredients are colloidal silicon dioxide, diacetylated monoglycerides, hypromellose, lactose monohydrate, maize starch, mannitol, talc and zinc stearate. The imprinting ink for sevelamer hydrochloride tablets has the following components: black iron oxide, butyl alcohol, isopropyl alcohol, propylene glycol, ammonium hydroxide and shellac. chemical-structure

Sodium sulfate, potassium sulfate and magnesium sulfate oral solution (for adults) is an osmotic laxative and is provided as two bottles each containing 6 ounces of solution. Each bottle contains: 17.5 grams sodium sulfate, 3.13 grams potassium sulfate, and 1.6 grams magnesium sulfate. Inactive ingredients include: anhydrous citric acid, malic acid, sodium benzoate, strawberry flavor, sucralose, purified water. Sodium Sulfate Anhydrous, USP The chemical name is Na 2 SO 4 . The average Molecular Weight is 142.04. The structural formula is: Potassium Sulfate, powder The chemical name is K 2 SO 4 . The average Molecular Weight is 174.3. The structural formula is: Magnesium Sulfate Dried, USP The chemical name is MgSO 4 . The average Molecular Weight: 120.361. The structural formula is: Each sodium sulfate, potassium sulfate and magnesium sulfate oral solution also contains a polypropylene mixing container. Pediatric use information is approved for Braintree Laboratories, Inc.’s SUPREP BOWEL PREP KIT (sodium sulfate, potassium sulfate, and magnesium sulfate) oral solution. However, due to Braintree Laboratories, Inc.’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. Sodiumsulfatepotassiumsulfateandmagnesiumsulfatestructure1 Sodiumsulfatepotassiumsulfateandmagnesiumsulfatestructure2 Sodiumsulfatepotassiumsulfateandmagnesiumsulfatestructure3

Sumatriptan and naproxen sodium tablets contain sumatriptan (as the succinate), a selective 5-hydroxytryptamine 1 (5-HT 1 ) receptor subtype agonist, and naproxen sodium, a member of the arylacetic acid group of NSAIDs. Sumatriptan succinate is chemically designated as 3-[2-(dimethylamino)ethyl]-N-methyl-indole-5-methanesulfonamide succinate (1:1), and it has the following structure: The molecular formula is C 14 H 21 N 3 O 2 S●C 4 H 6 O 4 , representing a molecular weight of 413.5. Sumatriptan succinate is a white to off- white powder that is soluble in water and in saline. Naproxen sodium is chemically designated as (S)-6-methoxy-α-methyl-2-naphthaleneacetic acid, sodium salt, and it has the following structure: The molecular formula is C 14 H 13 NaO 3 , representing a molecular weight of 252.23. Naproxen sodium is a white-to-creamy white crystalline solid, soluble in water at neutral pH. Each sumatriptan and naproxen sodium tablet 85 mg/500 mg for oral administration contains 119 mg of sumatriptan succinate, USP equivalent to 85 mg of sumatriptan and 500 mg of naproxen sodium, USP. Each tablet also contains the inactive ingredients colloidal silicon dioxide, croscarmellose sodium, crospovidone, dibasic calcium phosphate anhydrous, FD&C Blue No. 2, FD&C Yellow No. 6, hypromellose, iron oxide yellow, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, sodium chloride, sodium citrate and titanium dioxide. spl-sumatriptan-and-naproxen-sumatriptan-str spl-sumatriptan-and-naproxen-naproxen-sodium-str

Sunitinib is a kinase inhibitor present in sunitinib malate capsules as the malate salt. Sunitinib malate is described chemically as N-[2-(Diethylamino)ethyl]-5-[(Z)-(5-fluoro-1,2-dihydro-2-oxo-3H-indol-3-ylidene)methyl]-2,4-dimethyl-1H-pyrrole-3-carboxamide, compound with (S)-2-hydroxybutanedioic acid. The molecular formula is C 22 H 27 FN 4 O 2 .C 4 H 6 O 5 and the molecular weight is 532.57 Daltons. The chemical structure of sunitinib malate is: Sunitinib malate is light yellow to brownish orange colored powder with a pKa of 8.95. The solubility of sunitinib malate in aqueous media over the range pH 1.2 to pH 6.8 is in the range of 12 to 70 mg/mL. The log of the distribution coefficient (octanol/water) at pH 7 is 5.2. Sunitinib malate capsules are supplied as printed hard shell capsules containing 12.5 mg, 25 mg, 37.5 mg or 50 mg of sunitinib (equivalent to 16.7 mg, 33.4 mg, 50.1 mg, or 66.8 mg of sunitinib malate, respectively) together with croscarmellose sodium, magnesium stearate, mannitol and povidone (K-30) as inactive ingredients. The reddish brown gelatin capsule shells contain ferric oxide red and titanium dioxide. The caramel gelatin capsule shells contain ferric oxide red, ferric oxide yellow, ferrosoferric oxide and titanium dioxide. The yellow gelatin capsule shells contain ferric oxide yellow and titanium dioxide. The white printing ink contains potassium hydroxide, shellac and titanium dioxide. The black printing ink contains ferrosoferric oxide, potassium hydroxide and shellac. SPL-Sunitinib-Northstar-Molecular structure

Tadalafil is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). Tadalafil has the molecular formula C 22 H 19 N 3 O 4 representing a molecular weight of 389.41. The structural formula is: The chemical designation is pyrazino[1’,2’:1,6]pyrido[3,4-b]indole-1,4-dione,6-(1,3-benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methyl-,(6R,12aR)-. It is a crystalline solid that is practically insoluble in water and very slightly soluble in ethanol. Tadalafil tablets, USP are available as round shaped (2.5 mg) and oval shaped (5 mg, 10 mg, and 20 mg) tablets for oral administration. Each tadalafil tablet, USP contains 2.5 mg, 5 mg, 10 mg, or 20 mg of tadalafil, USP and the following inactive ingredients: colloidal silicon dioxide, crospovidone, hydroxypropyl cellulose, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, poloxamer, polyethylene glycol, talc, titanium dioxide, and yellow iron oxide. spl-tadalafil-structure

Telmisartan tablets, USP are a non-peptide angiotensin II receptor (type AT 1 ) antagonist. Telmisartan is chemically described as 4'-[(1,4'-dimethyl-2'-propyl [2,6'-bi-1H-benzimidazol]-1'-yl) methyl]-[1,1'-biphenyl]-2-carboxylic acid. Its empirical formula is C 33 H 30 N 4 O 2 , its molecular weight is 514.63, and its structural formula is: Telmisartan is a white to slightly yellowish solid. It is practically insoluble in water and in the pH range of 3 to 9, sparingly soluble in strong acid (except insoluble in hydrochloric acid), and soluble in strong base. Telmisartan, USP is available as tablets for oral administration, containing 20 mg, 40 mg or 80 mg of telmisartan. The tablets contain the following inactive ingredients: crospovidone, colloidal silicon dioxide, light magnesium oxide, mannitol, magnesium stearate and microcrystalline cellulose, sodium hydroxide, Telmisartan tablets are hygroscopic and require protection from moisture. stru

Tenofovir disoproxil fumarate tablet a prodrug of tenofovir which is a fumaric acid salt of bis-isopropoxycarbonyloxymethyl ester derivative of tenofovir. In vivo tenofovir DF is converted to tenofovir, an acyclic nucleoside phosphonate (nucleotide) analog of adenosine 5’-monophosphate. Tenofovir exhibits activity against HIV-1 reverse transcriptase. The chemical name of tenofovir DF is 9-[(R)-2-[[bis[[(isopropoxycarbonyl)oxy]methoxy]phosphinyl]methoxy]propyl] adenine fumarate (1:1). It has a molecular formula of C 19 H 30 N 5 O 10 P • C 4 H 4 O 4 and a molecular weight of 635.52. It has the following structural formula: Tenofovir DF is a white to off-white crystalline powder with a solubility of 13.4 mg/mL in distilled water at 25°C. It has an octanol/phosphate buffer (pH 6.5) partition coefficient (log p) of 1.25 at 25 °C. Tenofovir disoproxil fumarate is available as tablets. Tenofovir disoproxil fumarate tablets are for oral administration. Each tablet contains 300 mg of tenofovir DF, which is equivalent to 245 mg of tenofovir disoproxil. Each tablet contains the following inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose and pregelatinized starch. The 300 mg tablets are coated with opadry II white which contains hypromellose, lactose monohydrate, titanium dioxide and triacetin. In this insert, all dosages are expressed in terms of tenofovir DF except where otherwise noted. Tenofovirdisoproxilfumaratestructure

Timolol maleate ophthalmic solution, USP is a non-selective beta-adrenergic receptor blocking agent. Its chemical name is (-)-1-( tert -butylamino)-3-[(4-morpholino-1,2,5-thiadiazol-3-yl)oxy]-2-propanol maleate (1:1) (salt). Timolol maleate, USP possesses an asymmetric carbon atom in its structure and is provided as the levo-isomer. The optical rotation of timolol maleate is: 25° [α] in 1.0N HCl (C = 5%) = -12.2° (-11.7° to -12.5°) 405 nm Its molecular formula is C 13 H 24 N 4 O 3 S•C 4 H 4 O 4 and its structural formula is: Timolol maleate has a molecular weight of 432.50. It is a white to almost white crystalline powder which is soluble in water; sparingly soluble in ethanol; slightly soluble in chloroform; practically insoluble in ether. Timolol maleate ophthalmic solution is stable at room temperature. Timolol maleate ophthalmic solution, USP is supplied as a sterile, isotonic, buffered, aqueous solution of timolol maleate in two dosage strengths. Each mL of timolol maleate ophthalmic solution 0.5% contains 5 mg of timolol (6.8 mg of timolol maleate). Inactive ingredients: monobasic and dibasic sodium phosphate, sodium chloride, sodium hydroxide to adjust pH, and water for injection. Benzalkonium chloride 0.01% is added as preservative. structure

Timolol maleate ophthalmic gel forming solution is a non-selective beta­ adrenergic receptor blocking agent. Its chemical name is (-)-1-(tert-butylamino)-3-[(4­ morpholino-1,2,5-thiadiazol-3-yl)oxy]-2-propanol maleate (1:1) (salt). Timolol maleate possesses an asymmetric carbon atom in its structure and is provided as the levo-isomer. The optical rotation of timolol maleate is: 25° [α] in 1.0N HCl (C = 5%) = -12.2° (-11.7° to -12.5°). 405 nm Its molecular formula is C 13 H 24 N 4 O 3 S•C 4 H 4 O 4 and its structural formula is: Timolol maleate, USP has a molecular weight of 432.49. It is a white to practically white powder, which is soluble in water, methanol, and ethanol. Timolol maleate ophthalmic gel forming solution is supplied as a sterile, isotonic, buffered, aqueous solution of timolol maleate in two dosage strengths. The pH of the solution is 6.5 to 7.5, and the osmolality is 260-330 mOsmol/kg. Each mL of timolol maleate ophthalmic gel forming solution 0.25% contains 2.5 mg of timolol (3.4 mg of timolol maleate USP). Each mL of timolol maleate ophthalmic gel forming solution 0.5% contains 5 mg of timolol (6.8 mg of timolol maleate USP). Inactive ingredients: gellan gum, tromethamine, mannitol and water for injection. Preservative: benzododecinium bromide 0.012%. The gel forming solution contains a purified anionic heteropolysaccharide derived from gellan gum. An aqueous solution of gellan gum, in the presence of a cation, has the ability to gel. Upon contact with the precorneal tear film, timolol maleate ophthalmic gel forming solution forms a gel that is subsequently removed by the flow of tears.

Tobramycin inhalation solution, USP is a tobramycin solution for inhalation. It is a sterile, clear, slightly yellow, non-pyrogenic, aqueous solution with the pH and salinity adjusted specifically for administration by a compressed air driven reusable nebulizer. The chemical formula for tobramycin is C 18 H 37 N 5 O 9 and the molecular weight is 467.52 g/mol. Tobramycin is O-3-amino-3-deoxy-α-D-glucopyranosyl-(1→4)-O-[2,6-diamino-2,3,6- trideoxy-α-D-ribo-hexopyranosyl-(1→6)]-2-deoxy-L-streptamine. The structural formula for tobramycin is: Each single-dose 5 mL ampoule contains 300 mg tobramycin and 11.25 mg sodium chloride in sterile water for injection. Sulfuric acid and sodium hydroxide are added to adjust the pH to 6.0. Nitrogen is used for sparging. All ingredients meet USP requirements. The formulation contains no preservatives. Structure

Tobramycin inhalation solution, USP is a sterile, a clear, colorless or slight yellow to pale yellow color, non-pyrogenic, aqueous solution with pH and salinity adjusted. Tobramycin inhalation solution, USP is administered by a compressed air driven reusable nebulizer. The chemical formula for tobramycin, USP is C 18 H 37 N 5 O 9 and the molecular weight is 467.52. Tobramycin, USP is O-3-amino-3-deoxy-α-D-glucopyranosyl-(1→4)-O-[2,6-diamino-2,3,6-trideoxy-α-D-ribo-hexopyranosyl-(1→6)]-2-deoxy-L-streptamine. The structural formula for tobramycin, USP is: Each single-dose 4 mL ampule of tobramycin inhalation solution, USP contains one 300 mg dose of tobramycin, with sodium chloride and sulfuric acid in water for injection. Sulfuric acid and sodium hydroxide are used, as needed, to adjust the pH to 5.0. Nitrogen is used for sparging, filling and pouching. The formulation contains no preservatives. Tobramycin structural formula

Topiramate, USP is a sulfamate-substituted monosaccharide. Topiramate Extended-Release Capsules are available as 25 mg, 50 mg, 100 mg, 150 mg, and 200 mg capsules for oral administration as whole capsules or opened and sprinkled onto a spoonful of soft food. Topiramate, USP is a white to off-white powder. Topiramate, USP is freely soluble in dichloromethane. Topiramate, USP has the molecular formula C 12 H 21 NO 8 S and a molecular weight of 339.36 g/mol. Topiramate, USP is designated chemically as 2,3:4,5-Di-O-isopropylidene-β-D-fructopyranose sulfamate and has the following structural formula: Topiramate Extended-Release Capsules contain pellets of topiramate, USP in a capsule. The inactive ingredients are D&C red No.30, ethylcellulose, FD&C red No.40, hypromellose, microcrystalline cellulose, polyethylene glycol and talc. The capsule shell for Topiramate Extended-Release Capsules, 25 mg contains black iron oxide, hypromellose, red iron oxide and titanium dioxide. The capsule shell for Topiramate Extended-Release Capsules, 50 mg contains black iron oxide, hypromellose, red iron oxide, titanium dioxide, and yellow iron oxide. The capsule shell for Topiramate Extended-Release Capsules, 100 mg contains black iron oxide, hypromellose, red iron oxide and titanium dioxide. The capsule shell for Topiramate Extended-Release Capsules, 150 mg contains black iron oxide, hypromellose, and titanium dioxide. The capsule shell for Topiramate Extended-Release Capsules, 200 mg contains black iron oxide, hypromellose, red iron oxide, titanium dioxide, and yellow iron oxide. The imprinting ink has the following components: black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. structure

The topical corticosteroids constitute a class of primarily synthetic steroids used as anti-inflammatory and anti-pruritic agents. The steroids in this class include triamcinolone acetonide. Triamcinolone Acetonide Cream USP contains Triamcinolone Acetonide [Pregna-1,4-diene-3,20-dione,9-fluoro-11,21-dihydroxy-16,17-[(1-methylethylidene) bis- (oxy)]-, (11β,16α)-], with the empirical formula C 24 H 31 FO 6 and molecular weight 434.50. CAS 76-25-5. The structural formula is: Triamcinolone Acetonide Cream USP, 0.025% contains: 0.25 mg of Triamcinolone Acetonide, USP per gram in a base containing Emulsifying Wax, Cetyl Alcohol, Isopropyl Palmitate, Sorbitol Solution, Glycerin, Lactic Acid, Benzyl Alcohol and Purified Water. Triamcinolone Acetonide Cream USP, 0.1% contains: 1 mg of Triamcinolone Acetonide, USP per gram in a base containing Emulsifying Wax, Cetyl Alcohol, Isopropyl Palmitate, Sorbitol Solution, Glycerin, Lactic Acid, Benzyl Alcohol and Purified Water. Triamcinolone Acetonide Cream USP, 0.5% contains: 5 mg of Triamcinolone Acetonide, USP per gram in a base containing Emulsifying Wax, Cetyl Alcohol, Isopropyl Palmitate, Sorbitol Solution, Glycerin, Lactic Acid, Benzyl Alcohol and Purified Water. structure

The topical corticosteroids constitute a class of primarily synthetic steroids used as anti-inflammatory and antipruritic agents. The steroids in this class include triamcinolone acetonide. Triamcinolone acetonide is designated chemically as 9-Fluoro-11β,16α, 17, 21-tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16,17-acetal with acetone. The structural formula is: Each gram of Triamcinolone Acetonide Ointment USP, 0.025% ,0.1%, 0.5% contains 0.25 mg, 1 mg, 5 mg triamcinolone acetonide, respectively, in an ointment base of light mineral oil and white petrolatum. str

Valganciclovir for oral solution contains valganciclovir hydrochloride, USP (valganciclovir HCl), a hydrochloride salt of the L-valyl ester of ganciclovir that exists as a mixture of two diastereomers. Ganciclovir is a synthetic guanine derivative active against CMV. Valganciclovir HCl, USP is available as a powder for oral solution, which when constituted with water as directed contains 50 mg/mL valganciclovir free base. The inactive ingredients of valganciclovir for oral solution are anhydrous citric acid, mannitol, povidone, saccharin sodium, sodium benzoate, and tutti-frutti flavor. Valganciclovir HCl, USP is a white to off-white crystalline powder with a molecular formula of C 14 H 22 N 6 O 5 ·HCl and a molecular mass of 390.82. The chemical name for valganciclovir HCl, USP is L-Valine, 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]-3-hydroxypropyl ester, monohydrochloride. Valganciclovir HCl, USP is freely soluble in water, sparingly soluble in methanol. The pH for valganciclovir HCl, USP is 3.86 and the pKa for valganciclovir HCl, USP is 7.20. The chemical structure of valganciclovir is: All doses in this insert are specified in terms of valganciclovir. valganciclovirstructure

Varenicline tablets contain varenicline (as the tartrate salt), which is a partial nicotinic agonist selective for α 4 β 2 nicotinic acetylcholine receptor subtypes. Varenicline, as the tartrate salt, is a powder which is an off-white to light brown powder with the following chemical name: 7,8,9,10-tetrahydro-6,10-methano-6H-pyrazino [2,3-h] [3] benzazepine, (2R,3R)-2,3-dihydroxybutanedioate (1:1). It is soluble in water. Varenicline tartrate has a molecular weight of 361.35 Daltons, and a molecular formula of C 17 H 19 N 3 O 6 . The chemical structure is: Varenicline tablets are supplied for oral administration in two strengths: a 0.5 mg pink, capsular, biconvex, film coated tablets debossed with "H" on one side and "V23" on the other side and a 1 mg yellow, capsular, biconvex, film coated tablets debossed with "H" on one side and "V24" on the other side. Each 0.5 mg varenicline tablet contains 0.855 mg of varenicline tartrate equivalent to 0.5 mg of varenicline free base; each 1 mg varenicline tablet contains 1.71 mg of varenicline tartrate equivalent to 1 mg of varenicline free base. The following inactive ingredients are included in the tablets: anhydrous dibasic calcium phosphate, croscarmellose sodium, stearic acid. The film coating contains hypromellose, iron oxide red, iron oxide yellow, polyethylene glycol, titanium dioxide and triacetin. vareniclinestructure

Zileuton is an orally active inhibitor of 5-lipoxygenase, the enzyme that catalyzes the formation of leukotrienes from arachidonic acid. Zileuton has the chemical name (±)-1-(1-Benzo[b]thien-2-ylethyl)-1-hydroxyurea and the following chemical structure: Zileuton has the molecular formula C 11 H 12 N 2 O 2 S and a molecular weight of 236.29. It is a racemic mixture (50:50) of R(+) and S(-) enantiomers. Zileuton USP is a white to off-white powder that is freely soluble in methanol and sparingly soluble in acetonitrile. The melting point ranges from 144.2ºC to 145.2ºC. Zileuton extended-release tablets for oral administration are bi-layer film-coated tablets comprised of an immediate-release layer, and an extended-release layer. Zileuton extended-release tablets are oblong biconvex, bilayer film-coated tablets with pink to red IR layer debossed with '66' on one side and white to off white ER layer debossed with 'V' on the other side. Each tablet contains 600 mg of zileuton USP and the following inactive ingredients: colloidal silicon dioxide, crospovidone, ferric oxide, hydroxypropyl cellulose, hypromellose, magnesium stearate, mannitol, microcrystalline cellulose, pregelatinized starch, sodium lauryl sulfate, sodium starch glycolate. The film coating contains hypromellose and polyethylene glycol. zileutonertabstructure