SPL Set ID: fee7d073-0b99-48f2-7985-0d8cf970894b

IMITREX injection contains sumatriptan succinate, a selective 5-HT 1B/1D receptor 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: The empirical formula is C 14 H 21 N 3 O 2 S•C 4 H 6 O 4 , representing a molecular weight of 413.5. Sumatriptan succinate is a white to off-white powder that is readily soluble in water and in saline. IMITREX injection is a clear, colorless to pale yellow, sterile, nonpyrogenic solution for subcutaneous injection. Each 0.5 mL of IMITREX injection 8-mg/mL solution contains 5.6 mg of sumatriptan succinate equivalent to 4 mg of sumatriptan and 3.8 mg of sodium chloride, USP in Water for Injection, USP. Each 0.5 mL of IMITREX injection 12-mg/mL solution contains 8.4 mg of sumatriptan succinate equivalent to 6 mg of sumatriptan and 3.5 mg of sodium chloride, USP in Water for Injection, USP. The pH range of both solutions is approximately 4.2 to 5.3. The osmolality of both injections is 291 mOsmol. Sumatriptan Chemical Structure