muscle spasm
"I have a few degenerated disks and fibromyalgia.  These two conditions tend amplify each other; causing extreme back pain.  Some antidepressants/anti-anxiety meds will address fibromyalgia but they only work 24/7; the inherent sedation is not a wonderful way to go through life.  With Soma I can take care of this later in the day and because it amplifies opiates am able to take Tramadol instead of Percocet.  Be careful with that interaction as it is surprisingly powerful.  Be careful of using any other drugs as well while on Soma.  Although it is mildly euphoric I have not detected any physical or psychological addiction.  Also, you may find Soma "vacations" to increase its effectiveness during long term use."