medsource pharmaceuticals - Medication Listings

The active ingredient in Gabapentin Capsules USP is gabapentin, which has the chemical name 1-(aminomethyl)cyclohexaneacetic acid. The molecular formula of gabapentin is C 9 H 17 NO 2 and the molecular weight is 171.24. The structural formula of gabapentin is: Gabapentin is a white to off-white crystalline solid with a pK a1 of 3.7 and a pK a2 of 10.7. It is freely soluble in water and both basic and acidic aqueous solutions. The log of the partition coefficient (n-octanol/0.05M phosphate buffer) at pH 7.4 is –1.25. Each Gabapentin capsule contains 100 mg, 300 mg, or 400 mg of gabapentin and the following inactive ingredients: Pregelatinized Maize starch, talc, gelatin, titanium dioxide, yellow iron oxide (300 mg and 400 mg only), and red iron oxide (300 mg and 400 mg only), black iron oxide (300 mg and 400 mg only). Ingredients of Imprinting Ink( Black SW-9049) are Black Iron Oxide NF(E 172), Butyl Alcohol NF, Dehydrated Alcohol USP, Isopropyl Alcohol USP, Potassium Hydroxide NF, Propylene Glycol USP, Shellac NF, and Strong Ammonia Solution NF. figure1

The active ingredient in gabapentin capsules and tablets, USP is gabapentin, which has the chemical name 1-(aminomethyl)cyclohexaneacetic acid. The molecular formula of gabapentin is C 9 H 17 NO 2 and the molecular weight is 171.24. The structural formula of gabapentin is: Gabapentin, USP is a white to off-white crystalline solid with a pK a1 of 4.72±0.10 and a pK a2 of 10.27±0.29. It is freely soluble in water and both basic and acidic aqueous solutions. The log of the partition coefficient is -1.083±0.235 at 25°C temperature. Each gabapentin capsule contains 100 mg, 300 mg or 400 mg of gabapentin, USP and the following inactive ingredients: pregelatinized starch (maize), and talc. The 100 mg capsule shell contains gelatin, sodium lauryl sulfate (SLS) and titanium dioxide. The 300 mg capsule shell contains gelatin, titanium dioxide, FD&C Red 40, D&C Yellow 10, and sodium lauryl sulfate (SLS). The 400 mg capsule shell contains gelatin, titanium dioxide, sodium lauryl sulfate (SLS), D&C Yellow 10, and FD&C Red 40. The imprinting ink contains shellac, dehydrated alcohol, isopropyl alcohol, butyl alcohol, propylene glycol, strong ammonia solution, black iron oxide, and potassium hydroxide. Each gabapentin tablet contains 600 mg or 800 mg of gabapentin, USP and the following inactive ingredients: poloxamer 407, mannitol, magnesium stearate, hydroxypropyl cellulose, talc, copovidone, crospovidone, colloidal silicon dioxide and coating agent contains hypromellose, titanium dioxide, polyethylene glycol and talc. Gabapentin Structural Formula

Trazodone hydrochloride is a selective serotonin reuptake inhibitor and 5HT2 receptor antagonist. Trazodone hydrochloride, USP is a triazolopyridine derivative designated as 2-[3-[4-(3-chlorophenyl)-1-piperazinyl]propyl]- 1,2,4-triazolo[4, 3-a]pyridin-3(2H)-one hydrochloride. It is a white to off-white, crystalline powder which is sparingly soluble in chloroform and in water. The structural formula is represented as follows: Molecular Formula: C 19 H 22 C l N 5O •HCl Molecular Weight: 408.33 Each trazodone hydrochloride tablet, USP for oral administration contains 50 mg, 100 mg, 150 mg or 300 mg of trazodone hydrochloride, USP. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, pregelatinized starch, sodium lauryl sulfate, and sodium starch glycolate. The USP Dissolution Test is pending. Trazodone Hydrochloride Tablets USP

Trazodone hydrochloride tablets for oral administration contain trazodone hydrochloride, a selective serotonin reuptake inhibitor and 5HT2 receptor antagonist. Trazodone hydrochloride is a triazolopyridine derivative designated as 2-[3-[4-(3-chlorophenyl)-1-piperazinyl]propyl]-1,2,4-triazolo[4,3-a]pyridin-3(2 H )-one hydrochloride. It is a white odorless crystalline powder which is freely soluble in water. The structural formula is represented as follows: Molecular Formula: C 19 H 2 2 ClN 5 O · HCl Molecular Weight: 408.33 Each tablet, for oral administration, contains 50 mg, 100 mg, 150 mg or 300 mg of trazodone hydrochloride, USP. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, pregelatinized maize starch, sodium lauryl sulfate, and sodium starch glycolate. strucure

Each tablet for oral administration contains: Prednisone, USP.................................................. 10 mg, 20 mg and 50 mg Inactive Ingredients The tablets contain lactose monohydrate, microcrystalline cellulose, pregelatinized starch (maize starch), sodium starch glycolate and magnesium stearate. Prednisone tablets USP contain prednisone USP, which is a glucocorticoid. Glucocorticoids are adrenocortical steroids, both naturally occurring and synthetic, which are readily absorbed from the gastrointestinal tract. The chemical name for prednisone is pregna-1,4-diene-3,11,20-trione monohydrate,17,21-dihydroxy-. The structural formula is represented below: Prednisone is a white to practically white, odorless, crystalline powder. It is very slightly soluble in water; slightly soluble in alcohol, chloroform, dioxane, and methanol. FDA approved dissolution test specifications differ from USP. Structure

The active ingredient in the proton pump inhibitor Esomeprazole Magnesium Delayed-Release Capsules USP for oral administration is bis(5-methoxy-2-[(S)-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1 H -benzimidazole-1-yl) magnesium trihydrate. Esomeprazole is the S-isomer of omeprazole, which is a mixture of the S- and R- isomers. (Initial U.S. approval of esomeprazole magnesium: 2001). Its molecular formula is (C 17 H 18 N 3 O 3 S) 2 Mg x 3 H 2 O with molecular weight of 767.2 as a trihydrate and 713.1 on an anhydrous basis. The structural formula is: The magnesium salt is a white to slightly cream or slightly yellow colored powder. It contains 3 moles of water of solvation and is soluble in methanol. The stability of esomeprazole magnesium is a function of pH; it rapidly degrades in acidic media, but it has acceptable stability under alkaline conditions. At pH 6.8 (buffer), the half-life of the magnesium salt is about 19 hours at 25°C and about 8 hours at 37°C. Esomeprazole magnesium is supplied in delayed-release capsules. Each delayed-release capsule contains 20 mg, or 40 mg of esomeprazole (present as 22.3 mg, or 44.5 mg esomeprazole magnesium trihydrate USP) in the form of enteric-coated granules with the following inactive ingredients: glyceryl monostearate, hydroxypropyl cellulose, hypromellose, magnesium stearate, methacrylic acid copolymer, polysorbate 80, simethicone, sugar spheres, talc and triethyl citrate. The capsule shells have the following inactive ingredients: gelatin, FD&C Blue #1, titanium dioxide, ammonia solution, black iron oxide, butyl alcohol, dehydrated alcohol, isopropyl alcohol, propylene glycol, potassium hydroxide and shellac. Figure1

Celecoxib capsule is a nonsteroidal anti-inflammatory drug, available as capsules containing 50 mg, 100 mg, 200 mg and 400 mg celecoxib for oral administration. The chemical name is 4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl] benzenesulfonamide and is a diaryl-substituted pyrazole. The molecular weight is 381.38. Its molecular formula is C 17 H 14 F 3 N 3 O 2 S, and it has the following chemical structure: Celecoxib is a white to off-white powder with a pKa of 11.1 (sulfonamide moiety). Celecoxib is hydrophobic (log P is 3.5) and is practically insoluble in aqueous media at physiological pH range. The inactive ingredients in celecoxib capsules include: croscarmellose sodium, gelatin, lactose monohydrate, magnesium stearate, povidone, sodium lauryl sulfate and titanium dioxide. Details of non-volatile components of the imprinting ink are given below. 50 mg capsule contains shellac, propylene glycol, sodium hydroxide, titanium dioxide, povidone and FD&C Red #40 aluminum lake. 100 mg capsule contains shellac, propylene glycol, ammonia and FD & C Blue No. # 2 aluminum lake. 200 mg capsule contains shellac, propylene glycol, ammonia and yellow iron oxide. 400 mg capsule contains shellac, propylene glycol, ammonia, yellow iron oxide, and FD & C Blue No. # 1 aluminum lake. structural formula

Fluoxetine capsules, USP are a selective serotonin reuptake inhibitor for oral administration. It is designated (±)-N-methyl-3-phenyl-3- [(α,α,α-trifluoro-p-tolyl)oxy]propylamine hydrochloride and has the empirical formula of C 17 H 18 F 3 NO•HCl. Its molecular weight is 345.79. The structural formula is: Fluoxetine hydrochloride, USP is a white to off-white crystalline powder with a solubility of 14 mg/mL in water. Each capsule contains fluoxetine hydrochloride equivalent to 10 mg (32.3 μmol), 20 mg (64.7 μmol), or 40 mg (129.3 μmol) of fluoxetine. The capsules also contain the following inactive ingredients: pregelatinized starch (maize [corn]), colloidal silicon dioxide, gelatin, sodium lauryl sulphate, FD&C Blue #1, FD&C Red #3, and titanium dioxide. In addition 20 mg capsules also contains D&C Yellow #10 and 10 mg capsules also contains FD&C Yellow #6. The capsules are printed with edible ink containing black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. Chemical Structure

Cyclobenzaprine hydrochloride, USP is a white, crystalline tricyclic amine salt with the molecular formula C 20 H 21 N • HCl and a molecular weight of 311.9. It has a melting point of 217ºC, and a pK a of 8.47 at 25ºC. It is freely soluble in water and alcohol, sparingly soluble in isopropanol, and insoluble in hydrocarbon solvents. If aqueous solutions are made alkaline, the free base separates. Cyclobenzaprine hydrochloride is designated chemically as 3-( 5H -dibenzo[ a , d ] cyclohepten-5-ylidene)- N, N -dimethyl-1-propanamine hydrochloride, and has the following structural formula: Cyclobenzaprine hydrochloride is supplied as 5 mg or 10 mg tablets for oral administration. Each tablet contains the following inactive ingredients: croscarmellose sodium, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, pregelatinized starch (maize) and titanium dioxide. In addition 5 mg also contains D&C yellow #10 aluminum lake and FD&C yellow #6 aluminum lake and 10 mg also contains yellow iron oxide. FDA approved dissolution test specifications differ from USP. Chemical Structure

Ciprofloxacin tablets, USP are synthetic antimicrobial agents for oral administration. Ciprofloxacin hydrochloride, USP, a fluoroquinolone, is the monohydrochloride monohydrate salt of 1-cyclopropyl-6-fluoro-1, 4-dihydro-4-oxo-7-(1-piperazinyl)-3­-quinolinecarboxylic acid. It is a faintly yellowish to light yellow crystalline substance with a molecular weight of 385.8. Its molecular formula is C 17 H 18 FN 3 O 3 •HCl•H 2 O and its chemical structure is as follows: Ciprofloxacin is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid. Its molecular formula is C 17 H 18 FN 3 O 3 and its molecular weight is 331.4. It is a faintly yellowish to light yellow crystalline substance and its chemical structure is as follows: Ciprofloxacin film-coated tablets are available in 250 mg, 500 mg and 750 mg (ciprofloxacin equivalent) strengths. Each ciprofloxacin film-coated tablet contains 250 mg (equivalent to 291 mg ciprofloxacin hydrochloride monohydrate) or 500 mg (equivalent to 582 mg ciprofloxacin hydrochloride monohydrate) or 750 mg of ciprofloxacin (equivalent to 873 mg ciprofloxacin hydrochloride monohydrate). Ciprofloxacin tablets, USP are white to off-white. The inactive ingredients are colloidal silicon dioxide, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, sodium starch glycolate, and titanium dioxide. Chemical Structure Chemical Structure

Tramadol hydrochloride is an opioid agonist in an extended-release tablet formulation for oral use. The chemical name is (±) cis-2-[(dimethylamino)methyl]-1-(3-methoxyphenyl) cyclohexanol hydrochloride. Its structural formula is: The molecular weight of tramadol HCl is 299.84. It is a white, bitter, crystalline and odorless powder that is readily soluble in water and ethanol and has a pKa of 9.41. The n-octanol/water log partition coefficient (logP) is 1.35 at pH 7. Tramadol hydrochloride extended-release tablets USP contain 100, 200 or 300 mg of tramadol HCl in an extended-release formulation. The tablets are white to off-white in color and contain the inactive ingredients: colloidal silicon dioxide, dibutyl sebacate, ethyl cellulose, microcrystalline cellulose, povidone, and sodium stearyl fumarate. The imprinting ink contains shellac, iron oxide black and propylene glycol. Tramadol hydrochloride extended-release tablets USP meet USP Dissolution Test 3. image-1

Naproxen tablets, USP are nonsteroidal anti-inflammatory drugs and available as follows: Naproxen tablets, USP are available as light yellow round shaped tablets containing 250 mg naproxen, light yellow capsule shaped tablets containing 375 mg naproxen, and light yellow oblong shaped tablets containing 500 mg naproxen for oral administration. Naproxen is a propionic acid derivative related to the arylacetic acid group of nonsteroidal anti-inflammatory drugs. The chemical name for naproxen is (S)-6-methoxy-α-methyl-2-naphthaleneacetic acid. Naproxen has a molecular weight of 230.26 and a molecular formula of C 14 H 14 O 3 . It has the following structural formula: Naproxen is white or almost white crystalline powder. It is insoluble in water, soluble in chloroform, dehydrated ethanol and methanol. Sparingly soluble in ether. The octanol/water partition coefficient of Naproxen at pH < 2.18 is 3.18. Each naproxen tablet, USP contains the following inactive ingredients: croscarmellose sodium, yellow iron oxide, povidone and magnesium stearate Structural Formula

Alprazolam tablets, USP contain alprazolam which is a triazolo analog of the 1,4 benzodiazepine class of central nervous system-active compounds. The chemical name of alprazolam is 8-Chloro-1-methyl-6-phenyl-4H-s-triazolo [4,3-α] [1,4] benzodiazepine. The structural formula is: Alprazolam USP is a white to off-white, crystalline powder, which is soluble in methanol or ethanol but which has no appreciable solubility in water at physiological pH. Each alprazolam tablet USP, for oral administration, contains 0.25 mg, 0.5 mg, 1 mg, or 2 mg of alprazolam USP. Inactive ingredients: colloidal silicon dioxide, corn starch, docusate sodium 85% with sodium benzoate 15%, lactose monohydrate, magnesium stearate, and microcrystalline cellulose. In addition, the 0.5 mg tablet contains FD&C Yellow # 6 aluminum lake and the 1 mg tablet contains FD&C Blue No. 2 lake. Chemical Structure

Amoxicillin and clavulanate potassium tablets, USP is an oral antibacterial combination consisting of amoxicillin and the beta‑lactamase inhibitor, clavulanate potassium (the potassium salt of clavulanic acid). Amoxicillin, USP is an analog of ampicillin, derived from the basic penicillin nucleus, 6‑aminopenicillanic acid. The amoxicillin molecular formula is C 16 H 19 N 3 O 5 S•3H 2 O, and the molecular weight is 419.46. Chemically, amoxicillin, USP is ( 2S,5R,6R )-6-[( R )-(-)-2-Amino-2-( p -hydroxyphenyl)acetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid trihydrate and may be represented structurally as: Clavulanic acid is produced by the fermentation of Streptomyces clavuligerus . It is a beta-lactam structurally related to the penicillins and possesses the ability to inactivate some beta‑lactamases by blocking the active sites of these enzymes. The clavulanate potassium molecular formula is C 8 H 8 KNO 5 , and the molecular weight is 237.25. Chemically, clavulanate potassium, USP is potassium ( Z )-( 2R,5R )-3-(2-hydroxyethylidene)-7-oxo-4-oxa-1-azabicyclo[3.2.0]-heptane-2-carboxylate and may be represented structurally as: Amoxicillin and Clavulanate Potassium Tablets, USP: 250 mg/125 mg : Each tablet contains 250 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). 500 mg/125 mg: Each tablet contains 500 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). 875 mg/125 mg: Each tablet contains 875 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). Inactive Ingredients: colloidal silicon dioxide, ethylcellulose, hypromellose, magnesium stearate, microcrystalline cellulose, propylene glycol, sodium starch glycolate, talc and titanium dioxide. Each tablet of amoxicillin and clavulanate potassium tablets contains 0.63 mEq potassium. amoxi-stra.jpg amoxi-strb.jpg

Amoxicillin and clavulanate potassium tablets, USP is an oral antibacterial combination consisting of amoxicillin and the beta‑lactamase inhibitor, clavulanate potassium (the potassium salt of clavulanic acid). Amoxicillin, USP is an analog of ampicillin, derived from the basic penicillin nucleus, 6‑aminopenicillanic acid. The amoxicillin molecular formula is C 16 H 19 N 3 O 5 S•3H 2 O, and the molecular weight is 419.46. Chemically, amoxicillin, USP is ( 2S,5R,6R )-6-[( R )-(-)-2-Amino-2-( p -hydroxyphenyl)acetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid trihydrate and may be represented structurally as: Clavulanic acid is produced by the fermentation of Streptomyces clavuligerus . It is a beta-lactam structurally related to the penicillins and possesses the ability to inactivate some beta‑lactamases by blocking the active sites of these enzymes. The clavulanate potassium molecular formula is C 8 H 8 KNO 5 , and the molecular weight is 237.25. Chemically, clavulanate potassium, USP is potassium ( Z )-( 2R,5R )-3-(2-hydroxyethylidene)-7-oxo-4-oxa-1-azabicyclo[3.2.0]-heptane-2-carboxylate and may be represented structurally as: Amoxicillin and Clavulanate Potassium Tablets, USP: 250 mg/125 mg : Each tablet contains 250 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). 500 mg/125 mg: Each tablet contains 500 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). 875 mg/125 mg: Each tablet contains 875 mg of amoxicillin, USP as the trihydrate, and 125 mg of clavulanic acid (equivalent to 149 mg of clavulanate potassium, USP). Inactive Ingredients: colloidal silicon dioxide, ethylcellulose, hypromellose, magnesium stearate, microcrystalline cellulose, propylene glycol, sodium starch glycolate, talc and titanium dioxide. Each tablet of amoxicillin and clavulanate potassium tablets contains 0.63 mEq potassium. amoxi-stra.jpg amoxi-strb.jpg

Carisoprodol tablets are available as 350 mg round, white tablets. Carisoprodol is a white, crystalline powder, having a mild, characteristic odor and a bitter taste. It is slightly soluble in water; freely soluble in alcohol, in chloroform, and in acetone; and its solubility is practically independent of pH. Carisoprodol is present as a racemic mixture. Chemically, carisoprodol is (±)-2-Methyl-2-propyl-1,3-propanediol carbamate isopropylcarbamate and the molecular formula is C 12 H 24 N 2 O 4 , with a molecular weight of 260.33. The structural formula is: Other ingredients in the carisoprodol drug product include hydroxypropyl methylcellulose, lactose monohydrate, microcrystalline cellulose, sodium starch glycolate, stearic acid and talc. Structural Formula

Diclofenac sodium topical gel, 3%, intended for dermatologic use, contains the active ingredient, diclofenac sodium, in a clear, transparent, colorless to slightly yellow or orange gel base. Diclofenac sodium is a white or slightly yellowish hygroscopic crystalline powder. It is freely soluble in methanol, soluble in ethanol, sparingly soluble in water, slightly soluble in acetone, and partially insoluble in ether. The chemical name for diclofenac sodium is: Sodium [ o- (2,6-dichloranilino) phenyl] acetate Diclofenac sodium has a molecular weight of 318.13. The CAS number is CAS-15307-79-6. The structural formula is represented below: Diclofenac sodium topical gel, 3% also contains benzyl alcohol, sodium hyaluronate, polyethylene glycol monomethyl ether, and purified water. 1 g of diclofenac sodium topical gel, 3% contains 30 mg of the active substance, diclofenac sodium. Image

Etodolac is a member of the pyranocarboxylic acid group of nonsteroidal anti-inflammatory drugs (NSAIDs). Etodolac is a racemic mixture of [+]S and [-]R-enantiomers. Etodolac is a white crystalline compound, insoluble in water but soluble in alcohols, chloroform, dimethyl sulfoxide, and aqueous polyethylene glycol. The chemical name is (±) 1,8-diethyl-1,3,4,9-tetrahydropyrano-[3,4-b]indole-1-acetic acid. The molecular weight of the base is 287.37. It has a pKa of 4.65 and an n-octanol:water partition coefficient of 11.4 at pH 7.4. The molecular formula for etodolac is C 17 H 21 NO 3 , and it has the following structural formula: Each etodolac tablet, USP is for oral administration, contains 400 mg or 500 mg of etodolac. In addition, each tablet contains the following inactive ingredients: crospovidone, hydroxypropyl cellulose, hypromellose, magnesium stearate, methylcellulose, polyethylene glycol and titanium dioxide. etodolac-01

Hydroxyzine hydrochloride, USP has the chemical name of (±)-2-[2-[4-( p -Chloro-α-phenylbenzyl)-1-piperazinyl]ethoxy]ethanol dihydrochloride. Molecular Formula: C 21 H 27 ClN 2 O 2 · 2HCl Molecular Weight: 447.83 Hydroxyzine hydrochloride, USP occurs as a white, odorless powder which is very soluble in water. Each tablet for oral administration contains 10 mg, 25 mg, or 50 mg hydroxyzine hydrochloride, USP. Inactive ingredients include anhydrous lactose, colloidal silicon dioxide, crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate and titanium dioxide. stucture

Methocarbamol Tablets, USP, 500 mg and 750 mg, 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. Each tablet, for oral administration, contains either 500 mg or 750 mg of methocarbamol, USP. The inactive ingredients present are colloidal silicon dioxide, magnesium stearate, povidone, pregelatinized corn starch, purified water, sodium starch glycolate, and stearic acid. str

Tramadol hydrochloride and acetaminophen tablets USP combine 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, crystalline 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 tablet are corn starch, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate 80, pregelatinized starch (maize), sodium starch glycolate (potato), titanium dioxide and yellow iron oxide. Meets USP Dissolution Test 2. Structure1 Sturcture2