Benadryl (diphenhydramine hydrochloride) is an antihistamine drug having the chemical name 2-(Diphenylmethoxy)-N,N-dimethylethylamine hydrochloride. It occurs as a white, crystalline powder, is freely soluble in water and alcohol and has a molecular weight of 291.82. The molecular formula is C17H21NO • HCl, and structural formula:

BETAPACE AF (sotalol hcl) , (sotalol hydrochloride), is an antiarrhythmic drug with Class II (beta-adrenoreceptor blocking) and Class III (cardiac action potential duration prolongation) properties. It is supplied as a white, capsule-shaped tablet for oral administration. Sotalol hydrochloride is a white, crystalline solid with a molecular weight of 308.8. It is hydrophilic, soluble in water, propylene glycol and ethanol, but is only slightly soluble in chloroform. Chemically, sotalol hydrochloride is d,l-N-[4-[1- hydroxy-2-[(1-methylethyl)amino]ethyl]phenyl]methanesulfonamide monohydrochloride. The molecular formula is C12H20N2O3 S•HCl and is represented by the following structural formula:

BARACLUDE® is the trade name for entecavir, a guanosine nucleoside analogue with selective activity against HBV. The chemical name for entecavir is 2-amino-l,9-dihydro-9-[(1S,3R,4S)-4-hydroxy-3 -(hydroxymethyl)-2-methylenecyclopentyl] -6H-purin-6-one, monohydrate. Its molecular formula is C12H15N5O3•H2O, which corresponds to a molecular weight of 295.3. Entecavir has the following structural formula:

Betaseron® (Interferon beta-lb) is a purified, sterile, lyophilized protein product produced by recombinant DNA techniques. Interferon beta-1b is manufactured by bacterial fermentation of a strain of Escherichia coli that bears a genetically engineered plasmid containing the gene for human interferon betaser17. The native gene was obtained from human fibroblasts and altered in a way that substitutes serine for the cysteine residue found at position 17. Interferon beta-1b has 165 amino acids and an approximate molecular weight of 18,500 daltons. It does not include the carbohydrate side chains found in the natural material.

Butrans is a transdermal system providing systemic delivery of buprenorphine, a mu opioid partial agonist analgesic, continuously for 7 days. The chemical name of buprenorphine is 6,14ethenomorphinan-7-methanol, 17-(cyclopropylmethyl)- ?-(1,1-dimethylethyl)-4, 5-epoxy-18, 19dihydro-3-hydroxy-6-methoxy-?-methyl-, [5?, 7?, (S)]. The structural formula is:

CASODEX® (bicalutamide) Tablets contain 50 mg of bicalutamide, a non-steroidal androgen receptor inhibitor with no other known endocrine activity. The chemical name is propanamide, N [4 cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methyl-,(+-). The structural and empirical formulas are:

Benzonatate (benzonatate softgels) , a nonnarcotic oral antitussive agent, is 2,5,8,11,14,17,20, 23,26- nonaoxaoctacosan-28-yl-p-(butylamino) benzoate; with an average molecular weight of 603.7. The chemical formula is C30H53NO11, structural formula is:

Benzocaine                                                            14.0%

XIBROM (bromfenac ophthalmic solution) 0.09% is a sterile, topical, nonsteroidal antiinflammatory drug (NSAID) for ophthalmic use. Each mL of Xibrom contains 1.035 mg bromfenac sodium equivalent to 0.9 mg bromfenac free acid. Bromfenac sodium is designated chemically as sodium 2-amino-3-(4-bromobenzoyl) phenylacetate sesquihydrate, with an empirical formula of C15H11BrNNaO3 • 1?H2O. The structural formula of bromfenac sodium is:

ORBIVAN™ Butalbital, Acetaminophen and Caffeine Capsules, USP are supplied in hard-gelatin capsule form for oral administration.