migraine
"I am 57.  For about 10 years I have had occasional episodes of acute headaches to the point of vomiting.  Finally got diagnosed with migraine about 8 months ago (for some reason it never crossed my mind despite a family history of it).  Was prescribed sumatriptan.  Now, when I feel a migraine coming on I take 1/2 or 1 pill, along with naproxen.  Headache is gone within 1/2 hour.  My life has greatly improved.  No side effects at all."