twi pharmaceuticals, inc. - Medication Listings

Bupropion hydrochloride extended-release tablets USP (XL), an antidepressant of the aminoketone class, are chemically unrelated to tricyclic, tetracyclic, selective serotonin re-uptake inhibitor, or other known antidepressant agents. Its structure closely resembles that of diethylpropion; it is related to phenylethylamines. It is designated as (±)-1-(3-chorophenyl)-2-[(1,1-dimethylethyl)amino]-1-propanone hydrochloride. The molecular weight is 276.2. The molecular formula is C 13 H 18 ClNO·HCl. Bupropion hydrochloride powder is white, crystalline, and highly soluble in water. It has a bitter taste and produces the sensation of local anesthesia on the oral mucosa. The structural formula is: Bupropion hydrochloride extended-release tablets USP (XL) are supplied for oral administration as 150 mg and 300 mg white film caoted extended-release tablets. Each tablet contains the labeled amount of bupropion hydrochloride and the inactive ingredients: hypromellose, glyceryl behenate, hydropropyl cellulose, colloidal silicon dioxide, ethylcellulose, povidone, methacrylic acid copolymer type C, triethyl citrate, iron oxide black and propylene glycol. The tablets are printed with edible black ink. The insoluble shell of the extended-release tablet may remain intact during gastrointestinal transit and is eliminated in the feces. Meets USP Dissolution Test 8. image description

Guanfacine Tablets, USP are centrally acting antihypertensive with α 2 -adrenoceptor agonist properties in tablet form for oral administration. The chemical name of guanfacine hydrochloride, USP is N-amidino-2-(2,6-dichlorophenyl) acetamide hydrochloride and its molecular weight is 282.56. Its structural formula is: Guanfacine hydrochloride, USP is a white to off-white powder; sparingly soluble in water and alcohol and slightly soluble in acetone. Each tablet, for oral administration, contains guanfacine hydrochloride, USP equivalent to 1 mg or 2 mg guanfacine. In addition, each tablet contains the following inactive ingredients: anhydrous lactose, microcrystalline cellulose, pregelatinized starch, and stearic acid. FDA approved dissolution test specifications differ from USP. 042bf3b6-figure-01

Mmycophenolic acid delayed-release tablets, USP are an enteric formulation of mycophenolate sodium that delivers the active moiety mycophenolic acid (MPA). Mycophenolic acid is an immunosuppressive agent. As the sodium salt, MPA is chemically designated as (E)-6-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydroisobenzofuran-5-yl)-4-methylhex-4-enoic acid sodium salt. Its empirical formula is C 17 H 19 O 6 Na. The molecular weight is 342.32 g/mol and the structural formula is: Mycophenolic acid, USP as the sodium salt, is a white to off-white, crystalline powder and is highly soluble in aqueous media at physiological pH and practically insoluble in 0.1N hydrochloric acid. Mycophenolic acid is available for oral use as delayed-release tablets containing either 180 mg or 360 mg of mycophenolic acid. Inactive ingredients include crospovidone, hypromellose, lactose anhydrous, magnesium stearate, povidone, and starch. The enteric coating of the tablet consists of hypromellose phthalate, titanium dioxide, triethyl citrate, ferrosoferric oxide (180 mg), lactose monohydrate (180 mg), propylene glycol (180 mg) and triacetin (180 mg) or polyethylene glycol (360 mg), talc (360 mg), and FD&C yellow # 6 aluminum lake (360 mg). Mycophenolic acid structural formula.

The active ingredient in sevelamer carbonate tablets 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 (Renagel ® ). 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 tablets are 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 Sevelamer Carbonate Tablets: Each film-coated tablet of sevelamer carbonate tablets contains 800 mg of sevelamer carbonate on an anhydrous basis. The inactive ingredients are carnauba wax, hypromellose, hydroxypropyl cellulose, microcrystalline cellulose, polyethylene glycol, sodium chloride, titanium dioxide, and zinc stearate. The tablet imprint contains black iron oxide, propylene glycol and hypromellose. Figure 1