Been there but it did get better.  We had ours hospitalized.  He was there for a month because they didn't know what was wrong with him and the antidepressant they gave him made him manic.  When he got out of the hospital, I set him up with a new psychiatrist and took him to therapy twice a week.  I also arranged for after school care at the boys and girls club.  We just watched him closely and didn't let him go anywhere without us for awhile.  The meds took about 2 months to really kick in but his life now is so much better.  He's learning to drive, going to church, and hanging out with his friends.  We applied for him to go to the alternative school in our district and he was accepted.  He goes there half days and goes to votech to learn machining the other half of the day.  The lying has pretty much stopped.  We learned through therapy how to communicate with each other.  He's maturing and acting more responsible.  He realizes that drugs and smoking are wrong and it's not something he wants to do.  He's healthy now.  Just don't give up on your son.  Be thankful you found this out early so he can get some help and keep him from going too far astray.  I know exactly how you feel because I was there last year.  When ours was in the hospital I was looking into boys ranches and boarding schools.  They would've bankrupted us.  I came up with an alternative plan that didn't cost us much but he's doing so much better now.