The fact that drugs are illegal is the true problem.
Aren't they illegal for a reason? Maybe some drugs could be authorized. But addictive and health-destroy stuff are rightfully illegal. One might ask: Is it legal to prevent someone from destroying his own body? The problem is the highly addictiveness of the products. Someone may eventually want to stop taking the drug and be back to a normal life, but he just can't. The drug owns the user.