Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sumatriptan (trade names Imitrex, Imigran, Imigran recovery) is a triptan drug including a sulfonamide group for the treatment of migraine headaches. It is marketed and manufactured by GlaxoSmithKline as well as various generic drug manufacturers. Sumatriptan was the first triptan available (in 1991), and, in the United States and most developed countries, is available only by medical prescription. Several dosage forms for sumatriptan have been approved, including tablets, solution for injection, and nasal inhalers.