What are the possible side effects of sumatriptan (Imitrex, Imitrex Nasal)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using sumatriptan and call your doctor if you have a serious side effect such as: • chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling; • sudden numbness or weakness, especially on one side of the body; • sudden headache, confusion, problems…
