Probably so, he still took them.. i'm talking from experience... and from what i've learned.. it starts out as a few pills.. just for fun... then you really start to like the feeling... think about it this way... when he was in alot of pain.. and couldn't sleep.. or whatever.. lets take that example.. he needed something to help him ease the pain.. so he was a t a low point and this medicine helped him go up to normal... or some what normal.. but now according to what I understand, hes recovered and hes normal... so taking these pills now, will take him to a point higher than normal... and if he contnues to take them... which he might have a strong psychological urge to do so.. it could lead to addiction... now I am no psychologist.. but from what my teachers tell me (who have been clinical psychologists in the US, now teach here) that when they worked in the US...at first, they were shocked at how many people were addicted to prescribed pain killers.. it can happen to anybody... to a Doctor, Lawyer. House Wife... Construction worker..
So im sure hes aware of it,but there are millions addicted to pain killers... and even though they started out being aware of it... it just felt too good to stop it... 2 pills turn to 4 turn to 8 turn to 16 etc...