This sounds very much like my situation. Our son ran up debts and became moody and angry not even bothering to talk to me or my husband. It went on for a few years and we paid off his debts only for him to run them up again and then in January this year he became psychotic and ended up being sectioned and put on medication. They said it was from using cannabis and if he stays off it he should recover. He is in supported housing now but I know he’s back on the drugs again and i’m waiting for the devastation to happen all over again. Your son sounds very much like mine and I would be quite certain he’s on something but the trouble is that unless he wants to stop and unless he admits he has a problem then as parents there is nothing we can do. They hold all the cards. You and your husband must try and look after yourselves as its so stressful and gut wrenching all the time and you don’t want to become ill. Don’t let one person bring the rest of you down. Drug users are very selfish people, they don’t care about anyone elses feelings or concerns, its all about the next fix for them. Try and stay strong and don’t give him anymore money because thats only helping him buy drugs.