i dont know what opiate your referring to, but it mostly dosent matter, they all hit your natural opiate receptors in the same way, just a matter of dose. I do have a little experiance on the suject myself, as when i broke my leg, they gave me 20 miligarms of morphine in the abulance (10 to start , then two shots of 5 after the frist one wore off) then put me on a diulitated (hydromorphine if i remember correctly,drugstore heroin (heroin is diacetalmorphine ) for ten days, none of which i slept or ate (didnt think that was possible but was what happend). after 3 surgerys on my leg and 10 days in the hospiltal i got persciped to 60 percet plus two refills, which i flushed when i got home and went cold turkey. 10 plus days of shakes/nightmares/leg tremours (yes on my broken leg), probably the most pain ive ever been in but it had to be delt with, i knew better than to keep taking the drugs they gave me. it sucks man, but a heavy indica and your dead family can sure help. its hard but when its over you'll feel better and thank god every day he gave us weed so it could help us, at least that was how it was for me. when it gets too much pm me or something, i might be able to help you stay clean another hour or i simply may not be .... point is you'll stick with it till its done no matter how long it takes and you'll be back to just doin the drugs god intended.