migraine
"I've had migraines since I was about 9 years old because of a life long battle with insomnia. When I was a kid and I had my first migraine...I thought I was dying. I didn't understand what I had, what set it off or why I had it. And the pain and all of the vomiting. EVERYTHING hurt. Any light, the slightest noise and any movement I made while in bed made the migraine worse and I'd start vomiting NON-STOP. 
The doctor prescribed Maxalt to me. I didn't even know they MADE medicines for migraines and I have to say I cannot be without it.
But as the directions state, take AS SOON as you feel a migraine (not just a headache) coming on. Your body usually gives you signs, for me it's excessive yawning every few seconds and irritability."