How do pain killers affect you since having pfs

I never took an opiod before having pfs. Now that i have pfs and in my quest to stay sane ive taken a lot of opiods eppecially morphine and i can barely feel them. Ive seen old school junkies nod beyond belief injesting a fraction of what i would take and i still hardly feel them. I startind the opiods after having pfs and i have never noded or become anebriated. I take them like an anti depressant. It makes me feel a little better and i dont trust pharma anything anymore basically. Im wondering if my brain has been changed and if other pfs sufferers have had the problem of barely getting any relief from opiods since having pfs.

They used to work for me when I took them, but my bones are in such pain idk what to do anymore I no longer have a prescription for Vicodin…this bone and muscle loss is too much to take