Zagam® (sparfloxacin) tablets contain sparfloxacin, a synthetic broad-spectrum antimicrobial agent for oral administration. Sparfloxacin, an aminodifluoroquinolone, is 5-Amino-1-cyclopropyl-7-( cis -3,5-dimethyl-1-piperazinyl)-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid. Its empirical formula is C ₁₉ H ₂₂ F ₂ N ₄ O _3.

Sparfloxacin has a molecular weight of 392.41. It occurs as a yellow crystalline powder. It is sparingly soluble in glacial acetic acid or chloroform, very slightly soluble in ethanol (95%), and practically insoluble in water and ether. It dissolves in dilute acetic acid or 0.1 N sodium hydroxide.

Zagam is available as a 200-mg round, white film-coated tablet. Each 200-mg tablet contains the following inactive ingredients: microcrystalline cellulose NF, corn starch NF, L-hydroxypropylcellulose NF, magnesium stearate NF, and colloidal silicone dioxide NF. The film coating contains: methylhydroxypropylcellulose USP, polyethylene glycol 6000, and titanium dioxide USP.

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