I am on Baclofen, 10 mg, 3 times a day and I do find it very helpful. I get muscle spasms in my legs but the worst were in my rib cage, similar to what people with MS call "hugs", that would cut off my breath and make it painful to move. Baclofen has almost eliminated these entirely for me. I have never noticed any side effects from the drug, but I seldom experience side effects other than blurry vision from Gabapentin and Valium. I do have Valium for pudendal neuralgia when the spasms won't quit and I want to scream.
What dosage of Baclofen were you on when you quit?