The way they work is by increasing blood flow. Guys take it to increase vascularity before stepping on stage.
That might well be true, but it sounds like a cop-out to me. It's like someone saying they smoke pot for 'medicinal reasons'.
Actually a lot of bodybuilders, pro and amateur, use the magic blue pill, and not just when they step on stage but actually during training for the most part. Works better than any no2 product. Try it yourself, crazy pumps (not just in your pants)... Besides you said he may need it because of all that shit he's on.. That's the point though, that he actually wouldn't need it because of all that shit. I'm sure the amount of test he's taking keeps it going for him quiet well.