IMITREX (sumatriptan) Nasal Spray contains sumatriptan, a selective 5-hydroxytryptamine1 receptor subtype agonist. Sumatriptan is chemically designated as 3-[2-(dimethylamino)ethyl]-N-methyl-1H-indole-5-methanesulfonamide, and it has the following structure:

IMITREX (sumatriptan succinate) Injection is a selective 5-hydroxytryptamine1 receptor subtype agonist. Sumatriptan succinate is chemically designated as 3-[2-(dimethylamino)ethyl]N-methyl-indole-5-methanesulfonamide succinate (1:1), and it has the following structure:

IMITREX (sumatriptan succinate) Tablets contain sumatriptan (as the succinate), a selective 5-hydroxytryptamine1 receptor subtype agonist. Sumatriptan succinate is chemically designated as 3-[2-(dimethylamino)ethyl]-N-methyl-indole-5-methanesulfonamide succinate (1:1), and it has the following structure: