muscle spasm
"I was prescribed flexeril 10 mg twice a day as needed after experiencing lower back pain resulting from epidurals (I did not take this while I was pregnant or nursing).  My discs would slip out of place and pinch the nerve(s) in my back causing me great pain.  I would get adjusted to get the bone alignment right, but the swelling and pain was still there.  Flexeril worked great for me.  It is great to take at night; it helps you sleep. But, I have also taken it during the day if the pain was bad enough.  I will drink a 5 hour energy or something equivalent to help me stay awake and function at work.  I definitely wouldn't take this if I were driving.  This medication in combination with an 800 mg Ibuprofen is wonderful."