muscle spasm
"I have taken carisoprodol for about 7 years 3 per day as needed.  This is to prevent painful muscle cramps of my ribcage muscles, the intercostals.  These muscles are mostly pretty small but very painful when they cramp.  Tried flexeril 15 years ago for a couple of years.  They put me to sleep and did not prevent the cramps.  Dr then prescribed Robaxin which was unreliable at pretty high dosages.  I developed spinal issues both in the neck and low back.  Prescribed opioids throughout to alleviate pain of the back issues as well as the muscle cramps.  Soma for at least the last 7 years.  Very effective at preventing, and even stopping attacks.  10 minutes to take effect. No noticeable side effects or withdrawal. Maybe just lucky.  Great med."