muscle spasm
"I had 2 laminectomies at L4/L5 and the first one failed in 6 years, the second has been holding its own, but scar tissue has formed and the disks above and below are impinging the nerve slightly.  After 2 years of trying every muscle relaxer my pain management doctor used Baclofen 10mg 3 x daily.  I noticed improvement within a week and now in combination with Cymbalta 60mg daily, I can walk on my right leg without having to sit down every 5 minutes.  I don't have any side effects from Baclofen like Flexeril where I would drag all day and then the next day feel hung over and could not get off the couch."