Muscle Spasm
"Robaxin has worked very well for my back muscle spasms. Also for tension headache due to muscle tension in my neck and head. My only side effects were initially a feeling of constantly needing to urinate even when there was no need. But that went away after a few weeks. Now though I have been experiencing bad dreams and broken sleep, problem is I don&#039;t know if these negative effects are from the Robaxin or something else I am taking. I do take several other medications in addition to the Robaxin."