-Helping to find what was the cause that led to this. To convince him that through drugs he will not find a solution to anything; on the contrary, it will create problems that could be insurmountable. Make him understand that the drug affects not only his family but also society.
Make him know his values and that he regains confidence in himself. Encourage him by making him see that he is a useful person.
When a person understands that he can be useful, and give something of himself, life for him has a new meaning, he learns to have discipline, credibility and responsibility. 
