muscle spasm
"This stuff saved me. I've got some kind of pinched nerve in my neck/shoulder no one can pinpoint exactly (since I was 17). First time I pinched it, my neck and back siezed up so bad I thought I broke something. I'm easily out 3 days without this stuff and can't move. 1500mg/ 3x day when it's acting up. Doc says this acts on every muscle, so after 3 days your dose has to come down, it's too hard on your heart long-term. Otherwise, it's a god-send. Keeps me working, still mild pain since good pain killers make me sick. After a few days I knock the dose down, usually back to normal in 5 days. It'll make you a bit sleepy at first, but that wears off and doesn't come back once your body is used to it. No other side effects to mention."