I agree that you should consult a doctor about considering tizanidine(zanaflex) as a treatment option.  Its a muscle relaxor, but also helps block pain signals.  It also has a short biological half life so it will be out of your system quickly.  This cuts down on prolonged drowsiness.  You still may become drowsy during the first few hours tho, so consider taking the medication at bedtime.  Taken regularly it should have better results.  It can be habit forming, but I personally never had an issue with that.  I honestly thought it worked so well that I quit taking it b/c I felt I was not giving the proper attention to maintaining the cause of my pain and spasms.  I wasnt sure if simply blocking the pain and supressing the spasm was the right option for my overall health.  But it was a good start and a welcome relief.  Also consider that the spasms and pain are a warning sign from your body.  Instead of treating the symptom, try finding the cause.  Spinal issues, seizures, allergic reactions, infections, and other pathologies are all possibilities.