I take gabapentin (total of 2400 mg daily for muscle spasms and nerve pain), baclofen (10 mg tid - muscle relaxant), buproprion (600 mg - antidepressant), and tramadol (50 m,g tid for pain). Only side effects are some lightheadedness and sleepiness (a great help with sleeping more than 1 - 3 hours!) but definitely a Huge improvement for major leg spasms.
I wish you good luck in your journey.