AXERT (almotriptan malate) Tablets contain almotriptan malate, a selective 5-hydroxytryptamine1B/1D (5-HT1B/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: