ZELAPARÃ? Orally Disintegrating Tablets contain selegiline hydrochloride, a levorotatory acetylenic derivative of phenthylamine. Selegiline hydrochloride is described chemically as: (-)-(R)-N, α-dimethyl-N-2-propynylphenethylamine hydrochloride and its structural formula is:

Its empirical formula is C₁₃H₁₇N·HCl, representing a molecular weight of 223.75. Selegiline hydrochloride is a white to almost white crystalline powder that is freely soluble in water, chloroform, and methanol.

ZELAPARÃ? Orally Disintegrating Tablets are available for oral administration (not to be swallowed) in a strength of 1.25 mg. Each lyophilized orally disintegrating tablet contains the following inactive ingredients: gelatin, mannitol, glycine, aspartame, citric acid, yellow iron oxide, and grapefruit flavor.

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