Patented in 1982, Sumatriptan is a medication used to treat migraine headaches and cluster headaches. Plus, it is either taken by mouth, in the nose, or by injection under the skin. This medication basically works by narrowing blood vessels around the brain, stopping pain signals from being sent to the brain, and blocking the release of natural substances that cause pain, nausea, and other symptoms of migraine. Bear in mind that the side effects of Sumatriptan nasal include chest pressure, tiredness, vertigo, vomiting, and tingling. As for its serious side effects, they may include serotonin syndrome, heart attacks, strokes, and seizures. In fact, headaches may also occur when you overuse this medication. Therefore, you’d be safer if you used Sumatriptan nasal only as directed by your doctor. In other words, do not use more of it, do not use it more often, and do not use it for a longer time than your doctor ordered. It is worth noting that it is still unclear if using this medication during pregnancy or breastfeeding is safe. So, make sure you consult your doctor before using it.