muscle spasm
"Since auto accident that resulted in Occipital Neuralgia i have had dull pain in back of head, tingling/numbness in scalp and face, and headaches. I'm a 43 yr old healthy female And Neurologist prescribed this to take before bed because I sleep on my back which was affecting pain in back of head. Took one 500 mg before bed and was awful. Instant body shivers, tight chest and couldn't sleep. It did nothing to make me feel better. I will not take again. Did instantly call Dr on call because was scared of the affects and was told might just be allergic. Regardless this did nothing but make me feel awful before and after finally sleeping."