Not sure the best way to handle that issue. I've never known anyone with a drug problem but I did have a brother who was an alcoholic which is probably about the same thing. We tried lots of different things with him but he kept going back to alcohol. His dr even gave him pills that would make him violently ill if he drank anything with alcohol in it but that didn't work either. It was very sad for the entire family. Tough love, confinement, begging and pleading; you name it nothing helped my poor brother.