Posted 6/13/2016 1:36 PM (GMT 0)
This has been known for over a decade but researchers at Colorado Med University have shown that opiates and synthetic opiates absolutely make pain worse over time
You can research it here
http://www.colorado.edu/psych-neuro/peter-grace
All the other classes of fibro drugs have been shown to perpetuate the pain cycle over time - a process called neuro-adaptation and tolerance