My suggestion is that in order for us to help you, it would be good if you could give us some more background. in my opinion teens experimenting with sex, drugs, and alcohol are typical teen behaviors. "Good" kids do this stuff too, and it doesn't mean they will ruin their lives. I was no difficult child as a teen/ young adult, but I was no choir boy either, and I turned out okay. How long has this been going on? Does he get good grades? Does he get in any other kind of trouble? Has his personality or behavior changed recently? Has he started hanging out with new friends who are a bunch of losers? Does he have plans for after high school? I think that to some extent, how you handle this situation depends in part on how serious of an issue this is. With that being said, even if your son is an exceptional kid otherwise, your husband is correct. Maybe someone with more wisdom than I have will come along and offer better suggestions, but unfortunately i can't think of any other tool in the arsenal of a parent of an adult child other than to cut off support, and sometimes this means putting them out on the street. You really can't ground him or spank him or revoke his TV priveleges at this age. He is 18 and you have no legal requirement to give him anything. You simply have to set rules and consequences, and like I said for an adult child, these consequences need to involve stopping support. For example, do you let him use your car? If so, tell him next time he breaks the rules, no more car, or if he has his own car and you pay for it, tell him you will stop paying for it or take it away from him, and unfortunately if he simply refuses to live by your rules, you will have to kick him out. Being an adult does not mean you can simply do what you want whenever you want. Society has rules, and society has consequences for breaking those rules. Think of it this way: You putting him out for not obeying your rules is no different than if he had his own apartment and the landlord evicted him for breaking the lease. This is the way the adult world works. If you don't set rules and consequences, and you don't follow through when the rules are broken, you ARE enabling your son. You are enabling him to be a perpetual teenager. You are enabling him to not grow up and accept responsiblity for his actions, and you are enabling him to manipulate and use you. Some of us on here have kids in their 30's and older, and we can tell you that enabling DOES NOT help. Enabling just prolongs the problems for decades and you end up with middle aged teenagers who will bleed you dry until you are dead. Your son will do what he wants to do, and now that he is 18 you really can't stop him. Even if he does have a drug problem, I don't think there is any way you can force him to get help. You can suggest it, you can make it a condition of your continued support of him, but ultimately you can't force him. The only thing you can do is cut him off and tell him that you will not support him living a lifestyle you don't approve of. It seems sad and certainly makes you feel powerless, but it is the cold hard truth. Try as you might, and no matter how often you think it will be different this time, it probably won't. You just can't force another person to do anything, especilly an adult. When our son was a teen, he agreed to go to a residential treatment program to get help rather than jail. So what did he do? He got kicked out a few weeks into the program and ended up in juvenile hall anyway. If they have a substance abuse problem and don't want to help themselves, any help you try to give them will be an absoulte waste.