They don’t work for everyone.
I get all of the side effects of narcotics, but cannot hope for even a smidgen of pain relief if I take them.
Have you tried CBD a marijuana derivative without the psychoactive effects? It’s worth a shot if not.
There’s also THC, and marinol(a marijuana synthetic i believe, but could be wrong). Marinol is dosed out in capsules that come from a pharmacy and not some seedy dispensary.