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Bupropion hydrochloride extended-release tablets, USP (SR) are a non-nicotine aid to smoking cessation. Bupropion is chemically unrelated to nicotine or other agents currently used in the treatment of nicotine addiction. Initially developed and marketed as an antidepressant (WELLBUTRIN [bupropion hydrochloride] tablets and WELLBUTRIN SR [bupropion hydrochloride] sustained-release tablets), Bupropion hydrochloride extended-release tablets, USP (SR) is also 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-chlorophenyl)-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 USP is white powder, and soluble in 0.1N Hydrochloric acid, in alcohol (96.0%) and 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 (SR) are supplied for oral administration as 150-mg (purple), film-coated, sustained-release tablets. Each tablet contains the labeled amount of bupropion hydrochloride USP and the inactive ingredients: copovidone, cysteine hydrochloride, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate 80, titanium dioxide, FD&C Blue No.2 Lake and FD&C Red No. 40 Lake. In addition, flavoring agent contains dextrose, ethyl alcohol, gum arabic, propylene glycol and silicon dioxide. Bupropion hydrochloride extended-release tablets, USP (SR) meets USP dissolution Test 2. bupropion hydrochloride chemical structure