The idea that you are OK as long as you are not getting 'high' is a mistake; I treat opiate addicts every day and I rarely meet a person who is getting 'high' or even finding any enjoyment at all in using opiates! Opiate addicts don't look like people having fun, getting 'high'-- they look like people who have pain in some part of their body for whom a doctor prescribed too loosely, running the dose up higher and higher until the person gets dreadfully ill if they are taken away. Addicts tend to think about the drugs ALL THE TIME-- they cannot imagine life without them.... NOT because they are a source of fun, but because they will provide a break from the horrible sickness that comes when they are gone.
There is no end to tolerance; if you raise the dose of
methadoneMethadone
Methadone hydrochloride or oxycodone or any other opiate, you will only get used to the doe and end up right back in the same place, except on a higher amount of drug. Finally, it is hard to know whether you have serious disc disease or not based on the MRI; studies show that even people with no symptoms tend to have disc degeneration and bulges once they are over 40 or so.
If the pain is in your back, it is more likely related to muscle problems than to herniated discs and pinched nerves. Pain that runs down the leg on the other hand tends to come from nerves that are pinched by bulging or torn discs. The best approach for the former, i.e. back pain, is to see a 'physiatrist' or 'rehab doc'. The other pain 'down the leg' may indeed require surgery if it causes significant muscle weakness, severe pain, or incontinence of urine.