muscle spasm
"having had pain meds in the hospital were awful following Hip replacement. I was given hydrocodone and they think it was the cause of my BP dropping to 60/40. To avoid those opiots they gave me flexeril and it relieved the most excruciating spasms of my entire operative leg. Not quite sure but that it also is a source of giving me hypotension. If you are going to be comfortable laying down. My recommendation is this."