Does imitrex cause flu like symptoms? how long will it last? felt really off for about 7 hours now.

Drug side effects:: Any drug, medicine, supplement has the potential to have side effects. Some minor, some serious. Some common, some rare. Sumatriptan (Imitrex), can cause any of several side effects in SOME people. Not everyone gets every side effect. Some people get none. If you have chest pain, severe dizziness, shortness of breath, go to ER. See this page: https://www.drugs.com/sfx/imitrex-side-effects.htm