migraine
"Reading some of these reviews makes me wonder how much of a chance they gave the medication. 
I've had 'vascular' migraines since I was 13. I'm 35 today. I take Excedrin migraine for my headaches. I take Imitrex for my migraines. Used to be hard to tell the difference. I understand now the difference. But before I found Imitrex, I took all kinds of 'prevention' meds. Amitriptyline, nortriptyline, Zoloft, more than I can remember. Never prevented a darn thing. Just ended up with side effects from those. As a teen, that meant acne and weight gain. Aka, hell. 
It's been years now since I've found Imitrex. And like many, I was worried about trying it. But there came a day I couldn't NOT try it. 20 minutes later, I kicked myself for waiting."