Chlorzoxazone
muscle spasm
"This medication is GREAT! It really helped my frequent migraines from 15  a month down to maybe 4-5. There's an issue with my neck, still to be determined, and it apparently causes a lot of tension in my upper back, shoulder, neck, and even head. I initially had a little drowsiness with this medication; still less than baclofen and tizanidine. I kept on taking it and now I take 3-4 doses a day with no problems. I don't even notice I'm taking it! As a side note, I have RSD/CRPS in my shoulder and take Oxycontin and oxycodone regularly. I really like the Lorzone because it does NOT intensify the drowsiness that sometimes can occur with narcotics. I'm not sure if that's normal in all people, or if I've built up a tolerance over a year."