CompositionSumatriptan (50 mg) SALT INFORMATIONSumatriptan (50 mg) TYPICAL USAGE Cluster headache, migraine, treatment of acute migraine attacks. SIDE EFFECTS Tachycardia, cardiac arrhythmias, bradycardia, AV-block, nystagmus, seizures, angina, ventricular tachycardia, ventricular fibrillation, sinus bradycardia, atrial fibrillation, ischemic colitis, weakness, dizziness, vertigo, drowsiness, fatigue, palpitation, pain, irritation, flushing, diplopia, nausea and vomiting, muscle cramps, tingling. DRUG INTERACTION Sumatriptan is known to interact with other drugs like alcohol, citalopram (HBr), dihydroergotamine (Mesylate), ergotamine (Tartrate), fluvoxamine (Maleate), furazolidone, isocarboxazid, naratriptan, nitroglycerin, paroxetine, sertraline (HCl), sibutramine, tranylcypromine (Sulphate). Always consult your physician for the change of dose regimen or an alternative drug of choice that may strictly be required. MECHANISM OF ACTION Sumatriptan is a selective serotonin agonist that acts at 5-HT1 receptors. It causes vasoconstriction of cranial arteries and/or inhibition of neurogenic inflammatory processes in the CNS. A small but significant delay in gastric emptying also occurs.