Yikes.
Every time that I come to the prayer section, I seem to find people describing the same problems that I had at one stage of my life and I pretty much had them all. I started doing drugs when I was 16 years old and I did them until I almost died of a drug overdose shortly before I turned 27. I still recall being strapped to a gurney and carried out of my friend's basement and being rushed to the hospital in the back of an ambulance. I never thought that I'd make it there alive and I couldn't help but think of how my nieces and nephews and other family members were going to hear how I had died of an overdose. At that time, I wore a gold cross earring and I clung to it tenaciously on the ride in that it was the closest thing to "God" that I knew. It took the doctors 5 hours just to get my heartbeat regulated and even that required nitroglycerine. Anyhow, in my case, I pretty much didn't have any answers for the questions which constantly plagued me (Why am I here? What is life all about? What happens when I die? etc., etc.) and I did drugs to try to suppress the questions...which they never really did. Ultimately, your son needs Jesus Christ and Whom the Son sets free is free indeed. I haven't even thought about drugs for the last 27 years. Is your son open at all to the things of God?