Baclofen
"After trying several muscle relaxants, w very little success, I read a monograph from NSTA noting success in a limited study. Tried it 10mg 3x/day and it is equal to off-label benzodiazipines. NOTE: It does NOT improve pain from any underlying damage, only that directly related to the spasms!! It also improved my sleep by lessening nighttime stiffness (I also take 500mg magnesium at bedtime)
Side effects are tolerable however- Do not take with narcotics or alcohol "