Baclofen
"I was put on Baclofen for migraine/cluster headache as a treatment prevention and rescue medicine. It works great for me. It also helps my spasms from having a bladder and kidney disease and ruptured discs. It doesn't help the nerve pain, but overall I think it's better than every other muscle relaxer I've tried. I've had reactions to most and very allergic to Flexeril. I take 20mg up to 4x a day. I'm also okay on Percocet and Klonopin. The 3 make everyday life with constant pain and headaches a lot easier to deal with."