You shouldn't be on opiates and working out. At most run, play basketball or whatever sport you play. Lifting weights is a bad idea, been lifting since I was 12 (on and off). If you're trying to get stronger you shouldn't be on opiates, period. Your gains would be dramatically effected, not to mention how dangerous it is. It's dangerous enough when you aren't high. Just ask
Stafon Johnson.
All you guys that do take opiates and go lift should stop, get off the opiates, then get back to the gym and build your body and mind. The discipline you get from a strict workout regime will carry over into other parts of your life. Your mind will be "clear". You'll be able to think with a clear head. Don't waste you're time on the opiates in the gym.