I heard soboxion helps with weight loss and w/d...try reading on that..hope it helps.
Opiates are not the only way to control your pain. If you go to any reputable pain clinic and ask for oxycodone, telling them that it is the only way to help you, they will undoubtedly treat you as a drug seeker, which you are not. You need to approach a good pain doctor with an open mind, tell them your history fully and completely, describe to them your goal as it is: to be able to loose weight, to exercise and to live drug free; them let the doctor create a treatment plan. This plan may or may not involve opiates. S/he may try other medications, physical therapy or other treatments. You must give them some leeway as to your treatment plan. If you do not trust a physician, find another one, but do not doctor shop until you find one that writes you a script for oxy. Good luck to you.