Give him a break, he already said that it's from a doc and he was involved in a wreck 2 years ago. You think he'd still be on it if he wasn't in real pain? Pain is very subjective and not anyone elses place to judge. He's not taking it to cheat and go squat 1000lbs, he has a real medical issue. Last time I checked, that's what they make pills for in the first place. Not exactly like any of us really "needs" anabolics though is it?
To answer the question, narcotic agonists inhibit GH release and can result in inappropriate anti-diuretic hormone secretion. Be cautions not to become dehydrated, and be careful with oral steroids because narcs are stressful to the liver.
In the future, don't post questions like this in the anabolic forum. Do it in the Rx/OTC section where legitimate medical discussion of this type of drug is acceptable and the sharp critisism can better be avoided. That being said, DO NOT openly open threads about rec use of anything, that's not what AM is about.