"10 yrs ago i injured my back. i have had 4 back fusions. i have been on every narcotic and opiate at their highest possible dose. this is because i have an extremely efficient liver (doctors are baffles). one year ago i was at my wits end i went to a new pain management doctor. he asked if i ever tried methadone, nope, no one ever suggested it. well he prescribed it and i am currently on 120mg a day, and it has saved my life. two problems weight gain, excessive sweating. anyone else with these problems. "