Imitrex is a trusted migraine and cluster headache medication available in strengths of 25 mg, 50 mg, and 100 mg, featuring Sumatriptan as its active ingredient. It functions by constricting blood vessels in the brain, reducing inflammation, and relieving symptoms associated with these conditions. Produced by esteemed manufacturers, Imitrex is also marketed under the brand names Suminat, Sumitop, and Suwell.