I agree what everyone has said - you can't push him, help him, or lift his bottom - when he is ready then it will happen.
My RAH had his psychiatirst so snowed for about a year in regards to doing drugs. Addicts are so good at lying -
Trust me I totally understand the need to try everything, that is what I did, but nothing worked until he was ready to get clean. I don't know what it was, but it just happen one day and I didn't have anything to do with it.