muscle spasm
"My Pain Specialist prescribed this after multiple surgeries and diagnosis. I have the 4 mg table , but take 1 mg (the pills are scored into 1/4's) or more if needed. The 1 mg  at bedtime helps to relax your muscles and you don't wait up exhausted. I have tried Soma, Flexeril, and Skelaxin the the past and Tizanidine works the best!"