AXERT® (almotriptan malate) Tablets contain almotriptan malate, a selective 5-hydroxytryptamine_1B/1D (5-HT_1B/1D) receptor agonist. Almotriptan malate is chemically designated as 1-[[[3-[2-(Dimethylamino)-ethyl]-1H-indol-5-yl]methyl]sulfonyl]pyrrolidine (±)-hydroxybutanedioate (1:1), and its structural formula is:

Its empirical formula is C₁₇H₂₅N₃O₂S-C₄H₆O₅, representing a molecular weight of 469.56. Almotriptan is a white to slightly yellow crystalline powder that is soluble in water. AXERT® for oral administration contains almotriptan malate equivalent to 6.25 or 12.5 mg of almotriptan. Each compressed tablet contains the following inactive ingredients: mannitol, cellulose, povidone, sodium starch glycolate, sodium stearyl fumarate, titanium dioxide, hypromellose, polyethylene glycol, propylene glycol, iron oxide (6.25 mg only), FD&C Blue No. 2 (12.5 mg only), and carnauba wax.

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