How long does it take to completely withdraw from opiates?

My boyfriend hurt his back in football about five years ago. His disks are pushing on nerves t8 and t9. The only way to fix this is to collapse his lungs and do surgery through his chest. This is a risky operation, therefore is not the best option. The doctor has prescribed him every pain killer known to man even antidepressants at one point. My boyfriend went to the chiropractor, did acupuncture and epidurals. Nothing seemed to help so he just took his pain medicine for about two years. When his ex girlfriend began cheating on him he started abusing his medicine and snorting all of his pills. He later decided this was not the life he wanted and the doctor prescribed him suboxone to help him get off opiates. It got him off opiates but then he got addicted to suboxone. He took it for about a year, and began lowering his doses to just licking the pill every three days. Then he stopped completely and had the worst withdrawal symptoms for 10 days. This was in november 2009. The withdrawals stopped, but his organs began to hurt especially his liver and gallbladder. This gave him back pain on the right side. He did a gallbladder flush with olive oil and ped like 80 gall stones. He became completely pain free for about two days, and then the pain came back. We went to the doctor and did an ultrasound. The doctor did not find any more stones and said all his organs look healthy. Since then he has done liver cleanses, the redi clean cleanse, the master cleanse, epsom salt flush, parasite cleanse, and we purchased hundreds of dollars of supplements to help his liver and organs. We also eat all natural and organic. It is now march and he still sometimes experiences withdrawal symptoms and chest pain. Once every few weeks he is forced to take a percuset because he is in so much pain. How long will his withdrawals last? We have tried everything to get him to feel better and nothing works. He is even taking endorphigen supplements because the suboxone messed up his dopamine levels. He is very depressed and does not know why he is in so much pain, he feels like this is never going to stop and he's going to be forced to take pain medicine for the rest of his live. It makes me sad seeing him like this and it is beginning to effect our relationship. We are desperate for answers, any advice would be greatly appreciated. He's been to like 8 doctors and none of them have helped.