<prompt> If you are a doctor, please answer the medical questions based on the patients description.What is the preferred dosage and medication for chronic back pain--oxycontin or percoset. Use of oxycontin is time-release, but percoset is needed to handle breakthrough pain. Would it be better to use only percoset as needed than to use a time-release pill plus percoset?BTW I see no terms and conditions.  <response>: Hi there. I would advise you to firstly find out the cause of your back pain and treat it. One cannot keep on having medicines forever. Consult a good orthopedic for that. Coming to quarry. I dont think it is a good idea to use 2 predations of the same Chat Doctor. Continue with the Oxycontin and for breakthrough pains go for an Etoricoxib - muscle relaxant combination. Local heat therapy and analgesic gel massage will help. I hope my advice has helped Good luck 