migraine
"I started getting migraines at 11 years old. For the first few years, Excedrin Migraine would usually get rid of it. But then it stopped working. I finally went to a neurologist. At first I was put on Imitrex, but that either did absolutely nothing, or made the pain worse. After switching to 20 mg Relpax, I am so relieved! It almost always knocks out my migraine symptoms. Once in a while, it won't really work and I'll have to take a 40 mg. Although, one time I did have to go to the ER because I had a migraine for a week and Relpax wasn't working, every single other time it has worked! 
The only side effect I've noticed is that I'm a bit tired. However, this could just be due to the initial pain beforehand. But heck, I love Relpax!"