muscle spasm
"This drug is horrible, my doctor recommended I takeone  5mg tablet for 7 days before bed time for neck and trapezious muscle pain, I feel a loss of balance, I feel like I'm going to pass out, at the time is this writing this is 18 hours after I took this drug I can't function at all, I can't work because I feel like the room is spinning and I'm also getting these severe headaches that come off and on during the day, I will not be taking this anymore. I'll stick to my ibuprofen and moderate exercise for my neck and trapezious muscle pain. And PS, if your a coffee drinker or like your sodas those will enhance all these effects even worse, I recommend not having caffeine at ALL!"