@
Yzd Khalifa
I will go head and answer your questions, since I've done a lot of research about the drug problems in Iran, Afghanistan, and Pakistan AKA The Golden Crescent
1) Yes, Iran offers free treatment specially methadone treatment and clean syringes to drug addicts.
2) Young people in Iran might drink , smoke pot or take ecstasy for fun.
Hardcore drugs like Crack, Cocain, Heroine is not common among the youth, specially the Middle Class. Of course this is mostly secular population. Religious families don't do any drugs since it's against their religious beliefs.
3) I think the videos I posted explains exactly where the drugs in Iran come from and what groups run the trade.