micro labs limited - Medication Listings

Methazolamide USP, a sulfonamide derivative, is a white or faintly yellow, crystalline powder having a slight odor, soluble in dimethylformamide, slightly soluble in acetone, very slightly soluble in water and in alcohol. The chemical name for methazolamide is: N-[5-(aminosulfonyl)-3-methyl-1,3,4-thiadiazol-2(3H)-ylidene]-acetamide and it has the following structural formula: Each tablet, for oral administration, contains 25 mg or 50 mg methazolamide USP. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, dibasic calcium phosphate dihydrate, magnesium stearate, and microcrystalline cellulose. structure

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.

Metolazone tablets, USP, for oral administration contain 2.5 mg, 5 mg, or 10 mg of metolazone, USP, a diuretic/saluretic/antihypertensive drug of the quinazoline class. Metolazone has the molecular formula C 16 H 16 ClN 3 O 3 S, the chemical name 7-chloro-1, 2, 3, 4-tetrahydro-2- methyl-3-(2-methylphenyl)-4-oxo-6-quinazolinesulfonamide, and a molecular weight of 365.83. The structural formula is: Metolazone is only sparingly soluble in water, but more soluble in plasma, blood, alkali, and organic solvents. Inactive Ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose and dye: 2.5 mg - D&C Red No. 30 and FD&C Blue No. 1; 5 mg - FD&C Blue No. 2; 10 mg - D&C Yellow No. 10 and FD&C Yellow No. 6. metolazone-struc.jpg

Midazolam hydrochloride injection, USP is a water-soluble benzodiazepine available as a sterile, nonpyrogenic parenteral dosage form for intravenous or intramuscular injection. Each mL contains midazolam hydrochloride equivalent to 1 mg or 5 mg midazolam, USP compounded with 0.8% sodium chloride. The pH is adjusted to approximately between 2.7 and 3.3 with hydrochloric acid and, if necessary, sodium hydroxide. Midazolam, USP is a white or light yellow powder, insoluble in water. The hydrochloride salt of midazolam, which is formed in situ , is soluble in aqueous solutions. Chemically, midazolam HCl is 8-chloro-6-(2-fluorophenyl)-1-methyl-4 H -imidazo[1,5-a][1,4]benzodiazepine hydrochloride. Midazolam hydrochloride has the molecular formula C 18 H 13 ClFN 3 ∙HCl, a calculated molecular weight of 362.25 and the following structural formula: Under the acidic conditions required to solubilize midazolam in the product, midazolam is present as an equilibrium mixture (shown below) of the closed-ring form shown above and an open-ring structure formed by the acid-catalyzed ring opening of the 4,5-double bond of the diazepine ring. The amount of open-ring form is dependent upon the pH of the solution. At the specified pH of the product, the solution may contain up to about 25% of the open-ring compound. At the physiologic conditions under which the product is absorbed (pH of 5 to 8) into the systemic circulation, any open-ring form present reverts to the physiologically active, lipophilic, closed-ring form (midazolam) and is absorbed as such. The following chart plots the percentage of midazolam present as the open-ring form as a function of pH in aqueous solutions. As indicated in the graph, the amount of open-ring compound present in solution is sensitive to changes in pH over the pH range specified for the product: 3.0 to 4.0 for the 1 mg/mL concentration and 3.0 to 3.6 for the 5 mg/mL concentration. Above pH 5, at least 99% of the mixture is present in the closed-ring form. midazolam-stra.jpg midazolam-strb.jpg midazolam-strc.jpg

Misoprostol oral tablets contain either 100 mcg or 200 mcg of misoprostol, a synthetic prostaglandin E 1 analog. Misoprostol USP contains approximately equal amounts of the two diastereomers presented below with their enantiomers indicated by (±): Misoprostol USP is a clear, colorless or light yellow viscous liquid. Very slightly soluble in water. Inactive ingredients of tablets are colloidal silicon dioxide, hydrogenated castor oil, hypromellose, microcrystalline cellulose, and sodium starch glycolate. misotab-str.jpg

Nevirapine tablets USP, 200 mg is the brand name for nevirapine, a non-nucleoside reverse transcriptase inhibitor (NNRTI) with activity against Human Immunodeficiency Virus Type 1 (HIV-1). Nevirapine USP is structurally a member of the dipyridodiazepinone chemical class of compounds. The chemical name of nevirapine is 11-cyclopropyl-5, 11-dihydro-4-methyl-6H-dipyrido [3,2-b:2',3'-e][1,4] diazepin-6-one. Nevirapine USP is a white to off-white crystalline powder with the molecular weight of 266.30 and the molecular formula C 15 H 14 N 4 O. Nevirapine has the following structural formula: Nevirapine tablets USP, 200 mg is for oral administration. Each tablet contains 200 mg of nevirapine anhydrous and the inactive ingredients microcrystalline cellulose, lactose monohydrate, colloidal silicon dioxide, magnesium stearate, povidone, and Sodium starch glycolate. Structure

Nicardipine hydrochloride, USP is a calcium ion influx inhibitor (slow channel blocker or calcium channel blocker). Nicardipine hydrochloride injection, USP for intravenous administration contains 2.5 mg/mL of nicardipine hydrochloride, USP. Nicardipine hydrochloride, USP is a dihydropyridine derivative with IUPAC (International Union of Pure and Applied Chemistry) chemical name (±)-2-(benzyl-methyl amino) ethyl methyl 1,4- dihydro-2, 6-dimethyl-4- (m-nitrophenyl)-3,5-pyridinedicarboxylate monohydrochloride and has the following structure: Nicardipine hydrochloride, USP is a yellow to pale yellow, odorless, crystalline powder that has a melting point range of 165 to 170°C. It is soluble in methanol, sparingly soluble in ethanol, slightly soluble in acetone, chloroform and water. It has a molecular weight of 515.99. Nicardipine hydrochloride injection, USP is available as a sterile, non-pyrogenic, clear, yellow solution in 10 mL vials for intravenous infusion after dilution. Each mL contains 2.5 mg nicardipine hydrochloride USP, 0.305 mg benzoic acid and 7.5 mg sodium chloride, in Water for Injection. Sodium hydroxide (q.s.) may have been added to adjust pH to 3.2 to 4.2. FDA approved acceptance criteria for pH differ from the USP. structure

Nitrofurantoin is an antibacterial agent specific for urinary tract infections. Nitrofurantoin Capsules, USP (monohydrate/macrocrystals) are a hard gelatin capsule. Each capsule contains 100 mg of nitrofurantoin in the form of 25 mg of nitrofurantoin macrocrystals and 75 mg of nitrofurantoin monohydrate. The chemical name of nitrofurantoin macrocrystals is 1-[(E)-(5-nitrofuran-2-yl)methylideneamino] imidazolidine-2,4-dione. The chemical structure is the following: Molecular Weight: 238.16 The chemical name of nitrofurantoin monohydrate is 1-[(5-nitrofuran-2-yl)methylideneamino] imidazolidine-2,4-dione;hydrate. The chemical structure is the following: Molecular Weight: 256.18 Inactive Ingredients: Each capsule contains carbomer 974P, compressible sugar, ferrosoferric oxide, gelatin, hypromellose, iron oxide yellow, lactose monohydrate, magnesium stearate, povidone, pregelatinised starch, talc and titanium dioxide. The black monogramming ink contains ferrosoferric oxide, potassium hydroxide, shellac. The white monogramming ink contains potassium hydroxide, shellac and titanium dioxide. FDA approved dissolution test specifications differ from USP nitrofurantoin-strb.jpg nitrofurantoin-stra.jpg

Olmesartan medoxomil, USP a prodrug, is hydrolyzed to olmesartan during absorption from the gastrointestinal tract. Olmesartan is a selective AT 1 subtype angiotensin II receptor antagonist. Olmesartan medoxomil, USP is described chemically as 2,3-dihydroxy-2-butenyl 4-(1-hydroxy-1-methylethyl)-2-propyl-1-[ p -( o -1 H -tetrazol-5-ylphenyl)benzyl]imidazole-5-carboxylate, cyclic 2,3-carbonate. Its molecular formula is C 29 H 30 N 6 O 6 and its structural formula is: Olmesartan medoxomil, USP is a white to off-white crystalline powder with a molecular weight of 558.59. It is practically insoluble in water and sparingly soluble in methanol. Olmesartan medoxomil is available for oral use as film-coated tablets containing 5 mg, 20 mg, or 40 mg of olmesartan medoxomil USP and the following inactive ingredients: hydroxypropyl cellulose, hypromellose, lactose monohydrate, low-substituted hydroxypropyl cellulose, magnesium stearate, microcrystalline cellulose, talc, titanium dioxide, and iron oxide yellow (5 mg only). FDA approved dissolution test specifications differ from USP structure

Pirfenidone tablets belong to the chemical class of pyridone. Pirfenidone tablets are available as film-coated tablets containing 267 mg (yellow) and 801 mg (brown) pirfenidone. Pirfenidone has a molecular formula of C 12 H 11 NO and a molecular weight of 185.23. Pirfenidone has the following structural formula, which has been referred to as 5-methyl-1­-phenyl-2-1(H)-pyridone or 5-methyl-1-phenyl-2-(1H)-pyridone. Pirfenidone is a white to pale yellow crystalline powder. It is freely soluble in ethanol (96%), sparing soluble in water and very slightly soluble in heptane. The melting point is approximately 110.1°C to 110.2°C. Pirfenidone tablets contain pirfenidone and the following inactive ingredients: colloidal silicon dioxide, dibasic calcium phosphate dihydrate, sodium starch glycolate type A, polysorbate 80, maize starch B, sodium stearyl fumarate, polyvinyl alcohol, polyethylene glycol 3350, ferrosoferric oxide, iron oxide yellow (267 mg), iron oxide red (801 mg), talc and titanium dioxide. Structure

Piroxicam capsule USP, is a nonsteroidal anti-inflammatory drug, available as maroon and blue capsule contains 10 mg piroxicam USP, each maroon capsule contains 20 mg piroxicam USP for oral administration. The chemical name is 4-hydroxyl-2-methyl- N -2-­pyridinyl-2 H -1,2,-benzothiazine-3-carboxamide1,1-dioxide. The molecular weight is 331.35. Its molecular formula is C 15 H 13 N 3 O 4 S, and it has the following chemical structure. Piroxicam USP occurs as an off white to light tan or light yellow, odourless crystalline powder, practically insoluble in water, in dilute acids, and in most of the organic solvents. It is slightly soluble in alcohol and in aqueous solutions. It exhibits a weakly acidic 4-hydroxy proton (pKa 5.1) and a weakly basic pyridyl nitrogen (pKa 1.8). The inactive ingredients in piroxicam capsules USP include: lactose monohydrate, magnesium stearate, maize starch pregelatinised, and sodium lauryl sulfate. The empty hard gelatin capsule shell consists of FD & C Blue 1, FD & C Red 40, FD & C Red 3, gelatin, and titanium dioxide. structure

Proparacaine hydrochloride ophthalmic solution USP, 0.5% is a local anesthetic for ophthalmic instillation. Each mL of sterile aqueous solution contains active ingredient: proparacaine hydrochloride 5 mg (0.5%) and inactive ingredients: glycerin (tonicity agent), benzalkonium chloride, 0.01% (preservative) and water for injection (vehicle). The pH may be adjusted with hydrochloric acid and/or sodium hydroxide. At the time of manufacture, the air in the container is replaced by nitrogen. Proparacaine hydrochloride is designated chemically as 2-(Diethylamino) ethyl 3-amino-4-propoxybenzoate monohydrochloride. Graphic formula: C 16 H 26 N 2 O 3 •HCl MW 330.85 CAS-5875-06-9 proparacaine-stru

Ramelteon is an orally active hypnotic chemically designated as ( S )- N -[2-(1,6,7,8-tetrahydro-2 H -indeno-[5,4- b ]furan-8-yl)ethyl]propionamide and containing one chiral center. The compound is produced as the ( S )-enantiomer, with an empirical formula of C 16 H 21 NO 2 , molecular weight of 259.34, and the following chemical structure: Ramelteon is freely soluble in ethanol and benzyl alcohol, slightly soluble in acetonitrile, and practically insoluble in water. Each ramelteon tablet includes the following inactive ingredients: Copovidone, croscarmellose sodium, ferric oxide yellow, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, lactose monohydrate, magnesium stearate, maize starch, polyethylene glycol 8000 and titanium dioxide. ramelteon-structure.jpg

Ranolazine extended-release tablet is available as a film-coated, non-scored, extended-release tablet for oral administration. Ranolazine is a racemic mixture, chemically described as 1-piperazineacetamide, N ­ (2, 6-dimethylphenyl)-4-[2-hydroxy-3-(2-methoxyphenoxy) propyl]-, (±)-. It has an empirical formula of C 24 H 33 N 3 O 4 , a molecular weight of 427.54 g/mole, and the following structural formula: Ranolazine is a white to off-white crystalline powder. Ranolazine is soluble in dichloromethane and methanol; sparingly soluble in tetrahydrofuran, and acetonitrile; slightly soluble in toluene. Ranolazine extended-release tablets contain 500 mg or 1000 mg of ranolazine and the following inactive ingredients: hypromellose, magnesium stearate, methacrylic acid copolymer Type C (Copolymer based on ethyl acrylate and methacrylic acid and the surface-active agent such as sodium lauryl sulfate and polysorbate 80), microcrystalline cellulose and sodium hydroxide. Additional inactive ingredients for the 500 mg tablet include Macrogol/PEG, polyvinyl alcohol, polysorbate 80, sodium lauryl sulfate, talc, Iron Oxide Yellow, Iron Oxide Red and titanium dioxide; additional inactive ingredients for the 1000 mg tablet include lactose monohydrate, triacetin, Iron Oxide Yellow and titanium dioxide. ranolazine-strct.jpg

Rasagiline tablets contain rasagiline (as the mesylate), a propargylamine-based drug indicated for the treatment of idiopathic Parkinson’s disease. Rasagiline mesylate is designated chemically as: 1H-Inden-1­ amine, 2, 3-dihydro-N-2-propynyl-, (1R)-, methanesulfonate. The molecular formula of rasagiline mesylate is C 12 H 13 N•CH 4 SO 3 and its molecular weight is 267.34. Its structural formula is: Rasagiline mesylate is a white to off-white crystalline powder, freely soluble in water or ethanol and sparingly soluble in isopropanol. Each rasagiline tablet for oral administration contains rasagiline mesylate equivalent to 0.5 mg or 1 mg of rasagiline base. Each rasagiline tablets also contains the following inactive ingredients: citric acid monohydrate, colloidal silicon dioxide, corn starch, microcrystalline cellulose, pregelatinized starch (corn), stearic acid and talc. Structure

The active ingredient in roflumilast tablets is roflumilast. Roflumilast and its active metabolite (roflumilast N-oxide) are selective phosphodiesterase 4 (PDE4) inhibitors. The chemical name of roflumilast is N-(3,5-dichloropyridin-4-yl)-3-cyclopropylmethoxy-4-difluoromethoxy-benzamide. Its molecular formula is C 17 H 14 Cl 2 F 2 N 2 O 3 and the molecular weight is 403.22. The chemical structure is: The drug substance is a white to off-white non-hygroscopic powder with a melting point of 160°C. It is practically insoluble in water and hexane, sparingly soluble in ethanol and freely soluble in acetone. Roflumilast tablets are supplied as white to off white colored, round shaped, flat face, beveled edge, uncoated tablets, debossed with ‘0.25’ or ‘0.5’ on one face and plain on other face. Each tablet contains 250 mcg or 500 mcg of roflumilast. Each tablet of roflumilast for oral administration contains the following inactive ingredients: hydroxypropyl cellulose, lactose monohydrate, magnesium stearate, and maize starch. strc

Rufinamide tablet USP is a triazole derivative structurally unrelated to currently marketed antiepileptic drugs (AEDs). Rufinamide USP has the chemical name 1-[(2,6-difluorophenyl)methyl]-1 H -1,2,3-triazole-4 carboxamide. It has an empirical formula of C 10 H 8 F 2 N 4 O and a molecular weight of 238.2. The drug substance is a white to off white colour powder. Rufinamide is slightly soluble in tetrahydrofuran and in methanol; very slightly soluble in alcohol and in acetonitrile; practically insoluble in water. Rufinamide tablet USP is available for oral administration in film-coated tablets, scored on both sides, containing 200 and 400 mg of rufinamide. Inactive ingredients are colloidal silicon dioxide, corn starch, croscarmellose sodium, hypromellose, lactose monohydrate, magnesium stearate, methocel K 3 Premium LV hydroxypropyl methyl cellulose, microcrystalline cellulose and sodium lauryl sulfate. The film coating contains hypromellose, iron oxide red, polyethylene glycol, talc, and titanium dioxide. structure

The active ingredient in sevelamer carbonate tablet 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 Tablets: Each film-coated sevelamer carbonate tablet contains 800 mg of sevelamer carbonate on an anhydrous basis. The inactive ingredients are diacetylated monoglycerides, hypromellose, microcrystalline cellulose, polyethylene glycol 4000, titanium dioxide and zinc stearate. Imprinting ink contains ferrosoferric oxide and shellac. structure

Simvastatin is a prodrug of 3-hydoroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor that is derived synthetically from a fermentation product of Aspergillus terreus. Simvastatin is butanoic acid, 2,2-dimethyl-,1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)-ethyl]-1-naphthalenyl ester, [1S-[1α,3α,7β,8β(2S * ,4S * ),-8aβ]]. The molecular formula of simvastatin is C 25 H 38 O 5 and its molecular weight is 418.57. Its structural formula is: Simvastatin, USP is a white to off-white, nonhygroscopic, crystalline powder that is practically insoluble in water, and freely soluble in chloroform, methanol and ethanol. Simvastatin tablets, USP for oral use contain 5 mg, 10 mg, 20 mg, 40 mg or 80 mg of simvastatin, USP and the following inactive ingredients: ascorbic acid, citric acid monohydrate, hydroxypropyl cellulose, hypromellose, iron oxide yellow (5 mg), lactose monohydrate, magnesium stearate, microcrystalline cellulose, pregelatinized maize starch, talc, and titanium dioxide. Butylated hydroxyanisole is added as a preservative. simvastatin-structure.jpg

Sodium nitroprusside injection is disodium pentacyanonitrosylferrate(2-) dihydrate, a hypotensive agent whose structural formula is Sodium Nitroprusside USP whose molecular formula is Na 2 [Fe(CN) 5 NO] • 2H 2 O, and whose molecular weight is 297.95. Dry sodium nitroprusside is a reddish-brown powder, soluble in water. In an aqueous solution infused intravenously, sodium nitroprusside is a rapid-acting vasodilator, active on both arteries and veins. Sodium nitroprusside solution is rapidly degraded by trace contaminants, often with resulting color changes. (See DOSAGE AND ADMINISTRATION section.) The solution is also sensitive to certain wavelengths of light, and it must be protected from light in clinical use. Sodium Nitroprusside Injection is available as: 50 mg Flip off Vial – Each 2 mL vial contains the equivalent of 50 mg sodium nitroprusside dihydrate in sterile water for injection. Structure

Succinylcholine Chloride Injection, USP is a sterile, nonpyrogenic solution to be used as a short-acting, depolarizing neuromuscular blocker for intravenous or intramuscular use. Succinylcholine chloride injection, USP contains succinylcholine chloride as the active pharmaceutical ingredient. Succinylcholine Chloride, USP is chemically designated C 14 H 30 Cl 2 N 2 O 4 .2H 2 O and its molecular weight is 397.34. The chemical name of succinylcholine chloride is ethanaminium, 2,2'-[(1,4-dioxo-1,4 butanediyl)bis(oxy)] bis[N,N,N-trimethyl-ethanaminium], dichloride. Succinylcholine chloride is a diquaternary base consisting of the dichloride salt of the dicholine ester of succinic acid. It is a white or almost white, crystalline powder, odorless, very soluble in water. It has the following structural formula: Succinylcholine chloride injection USP, 200 mg/10 mL (20 mg/mL) is intended for multiple-dose administration and contains preservative. Each 1 mL of succinylcholine chloride injection USP, 200 mg/10 mL (20 mg/mL) multiple-dose fliptop vials contains: 20 mg of succinylcholine chloride, USP (equivalent to 22mg of succinylcholine chloride dihydrate), 1.8 mg of methylparaben and 0.2 mg of propylparaben as preservatives, 4.7 mg of sodium chloride as iso-osmotic agent, and sodium hydroxide and hydrochloric acid as pH adjusters in water for injection. The pH of the solution is between 3.0 and 4.5, with an osmolarity of 0.338 mOsm/mL (calc.). succinylcholine-stru.jpg

Tafluprost is a fluorinated analog of prostaglandin F2α. The chemical name for tafluprost is 1-methylethyl (5 Z )-7-{(1 R , 2 R , 3 R , 5 S )-2-[(1 E )-3,3-difluoro-4-phenoxy-1-butenyl}-3,5-dihydroxycyclopentyl]-5-heptenoate. The molecular formula of tafluprost is C 25 H 34 F 2 O 5 and its molecular weight is 452.53. Its structural formula is: Tafluprost is a colorless to light yellow viscous liquid that is practically insoluble in water. Tafluprost ophthalmic solution 0.0015% is supplied as a sterile solution of tafluprost with a pH range of 5.5 to 6.7 and an Osmolality range of 260 to 300 mOsmol/kg. Tafluprost ophthalmic solution contains Active: tafluprost 0.015 mg/mL; Inactives: edetate disodium, glycerin, monobasic sodium phosphate dihydrate, polysorbate 80, hydrochloric acid and sodium hydroxide (to adjust pH) and water for injection. Tafluprost ophthalmic solution does not contain a preservative. tafluprost-str.jpg

Telmisartan tablets, USP is a non-peptide angiotensin II receptor (type AT 1 ) antagonist. Telmisartan is chemically described as 4'-[(1,4’-dimethyl-2'-propyl [2,6'-bi-1 H -benzimidazol]-1'-yl)methyl]-[1,1'-biphenyl]-2-carboxylic acid. Its molecular formula is C 33 H 30 N 4 O 2 , its molecular weight is 514.62, and its structural formula is: Telmisartan USP is a white to slightly yellowish crystalline powder. 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 USP. The tablets contain the following inactive ingredients: crospovidone Type A/kollidon CL, mannitol, magnesium stearate, meglumine, povidone K-30, and sodium hydroxide. Telmisartan tablets USP are hygroscopic and require protection from moisture. telmisartanstructure.jpg

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 possesses an asymmetric carbon atom in its structure and is provided as the levo-isomer. The optical rotation of timolol maleate is: 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, odorless, 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 USP, 0.25% contains 2.5 mg of timolol (3.4 mg of timolol maleate). The pH of the solution is between 6.5 and 7.5, and the osmolality is 260 to 340 mOsm/kg. Each mL of timolol maleate ophthalmic solution USP, 0.5% contains 5 mg of timolol (6.8 mg of timolol maleate). Inactive ingredients: monobasic and dibasic sodium phosphate, sodium hydroxide to adjust pH, and water for injection. Benzalkonium chloride 0.01% is added as preservative. timololmaleate-fig.jpg timololmaleate-stru.jpg

Timolol maleate 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: 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, odorless, crystalline powder which is soluble in water, methanol, and alcohol. Timolol maleate is stable at room temperature. Timolol maleate ophthalmic solution is supplied in two formulations: timolol maleate ophthalmic solution, which contains the preservative benzalkonium chloride; and timolol maleate ophthalmic solution, the preservative-free formulation. Preservative-free timolol maleate ophthalmic solution, USP is supplied in a single-dose vial, as a sterile, isotonic, buffered, aqueous solution of timolol maleate in one dosage strength. The pH of the solution is approximately 6.8 to 7.2, and the osmolarity is 252 to 328 mOsm. Each mL of preservative-free timolol maleate ophthalmic solution USP, 0.5% contains 5 mg of timolol (6.8 mg of timolol maleate). Inactive ingredients: dibasic sodium phosphate dodecahydrate, monobasic sodium phosphate (dihydrate), sodium hydroxide to adjust pH, and water for injection. timolol-struc.jpg timolol-structure.jpg

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 467.51. 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 ampule contains 300 mg tobramycin, USP 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. tobramycin-structure.jpg

Tramadol hydrochloride and acetaminophen tablet USP combines two analgesics, tramadol hydrochloride and opioid agonist, and acetaminophen. The chemical name for tramadol hydrochloride is (±)cis-2-[(dimethylamino)methyl]-1-(3-methoxyphenyl) cyclohexanol hydrochloride. Its structural formula is: The molecular weight of tramadol hydrochloride is 299.84. Tramadol hydrochloride USP is a white, bitter, crystalline, and odorless powder. The chemical name for acetaminophen is N-acetyl-p-aminophenol. Its structural formula is: The molecular weight of acetaminophen is 151.17. Acetaminophen USP is an analgesic and antipyretic agent which occurs as a white, odorless, crystalline powder, possessing a slightly bitter taste. Tramadol hydrochloride and acetaminophen tablets, USP contain 37.5 mg of tramadol hydrochloride, USP and 325 mg acetaminophen, USP and are light yellow in color. Inactive ingredients in the tablets are powdered cellulose, pregelatinized starch, sodium starch glycolate, corn starch, magnesium stearate and OPADRY ® Light Yellow. OPADRY ® Light Yellow consists of the following ingredients: Hypromellose 2910 Titanium Dioxide Polyethylene Glycol 400 Iron oxide yellow Polysorbate 80 Meets USP Dissolution Test 2. tramadol structure acetaminophen structure

Tranexamic acid is trans-4-(aminomethyl)cyclohexanecarboxylic acid, an antifibrinolytic agent. Tranexamic acid is a white crystalline powder. The structural formula is Molecular Formula: C 8 H 15 NO 2 Molecular Weight: 157.2 Each mL of the sterile solution for intravenous injection contains 100 mg tranexamic acid and Water for Injection to 1 mL. The aqueous solution for injection has a pH of 6.5 to 8.0. STRUCTURE

Travoprost is a synthetic prostaglandin F analog. Its chemical name is [1R-[1α(Z),2β(1E,3R*),3α,5α]]-7-[3,5-Dihydroxy-2-[3-hydroxy-4-[3-(trifluoromethyl)phenoxy]-1-butenyl]cyclopentyl]-5-heptenoic acid, 1-methylethylester. It has a molecular formula of C 26 H 35 F 3 O 6 and a molecular weight of 500.55 g/mol. The chemical structure of travoprost is: Travoprost, USP is a clear, colorless to slightly yellow oil that is very soluble in acetonitrile, methanol, octanol, and chloroform. It is practically insoluble in water. Travoprost ophthalmic solution USP, 0.004% (ionic buffered solution) is supplied as sterile, buffered aqueous solution of travoprost with a pH of approximately 5.7 and an osmolality of approximately 290 mOsmol/kg. Each mL of travoprost ophthalmic solution USP, 0.004% (ionic buffered solution) contains Active: travoprost USP, 0.04 mg/mL; Inactives: Polyoxyl 40 hydrogenated castor oil, boric acid, propylene glycol, sorbitol, zinc chloride, sodium hydroxide and/or hydrochloric acid (to adjust pH) and water for injection. travoprost-str.jpg

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. Structural formula: C 24 H 31 FO 6 MW 434.51 g/mol Each mL of 0.1% triamcinolone acetonide lotion, USP provides 1 mg triamcinolone acetonide, USP in a lotion base containing cetyl alcohol, citric acid, polysorbate 20, propylene glycol, purified water, simethicone 30% emulsion, sorbitan monopalmitate and stearyl alcohol. Image

Varenicline tablets contain varenicline (as the tartrate salt), which is a partial nicotinic agonist selective for α4β2 nicotinic acetylcholine receptor subtypes. Varenicline, as the tartrate salt, is a powder which is a white to off-white to slightly yellow solid with the following chemical name: 7,8,9,10-tetrahydro-6,10-methano-6 H -pyrazino[2,3- h][3]benzazepine, (2 R ,3 R )-2,3-dihydroxybutanedioate (1:1). It is highly soluble in water. Varenicline tartrate has a molecular weight of 361.35 Daltons, and a molecular formula of C 13 H 13 N 3 • C 4 H 6 O 6 . The chemical structure is: Varenicline tablets are supplied for oral administration in two strengths: a 0.5 mg oval shaped, biconvex, white to off-white, film-coated tablet debossed with "0.5" on one side and plain on the other side and a 1 mg oval shaped, biconvex, light blue film-coated tablet debossed with "1" on one side and plain on the other side. Each 0.5 mg varenicline tablet contains 0.85 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: microcrystalline cellulose, anhydrous dibasic calcium phosphate, croscarmellose sodium and stearic acid. In addition, the 0.5 mg tablets are coated with the Opadry® White which contains hypromellose, polyethylene glycol and titanium dioxide, and 1 mg tablets are coated with Opadry ® Blue which contain hypromellose, polyethylene glycol, titanium dioxide and FD&C blue #2. varenicline-img.jpg

Verapamil Hydrochloride is calcium antagonist or slow channel inhibitor. Verapamil Hydrochloride Injection, USP is available in 5 mg/2 mL and 10 mg/4 mL single dose vials (for intravenous administration). Each 1 mL of solution contains 2.5 mg verapamil HCl and 8.5 mg sodium chloride in water for injection. Hydrochloric acid and/or sodium hydroxide is used for pH adjustment. The pH of the solution is 4.9 (4.0 to 6.5). Protect contents from light. Verapamil Hydrochloride Injection, USP vials are sterile. The structural formula of verapamil HCl USP is given below: Benzeneacetonitrile, α-[3-[[2-(3,4-dimethoxyphenyl)ethyl] methylamino]propyl]-3,4-dimethoxy-α-(1-methylethyl) hydrochloride Molecular weight: 491.07 Molecular formula: C 27 H 38 N 2 O 4 • HCl Verapamil HCl USP is an almost white, crystalline powder practically free of odor, with a bitter taste. It is soluble in water, chloroform and methanol. Verapamil HCl is not chemically related to other antiarrhythmic drugs. Structure