I was mostly posting because I wasn't sure if calling 911 would help. I didn't know if they would take someone against their will, even if they are clearly high. I didn't know if the police would help if all he is doing is looking half concious laying on the couch.
I was afraid I would call and they would look at him and say "he is in his own house, he isn't causing any problems, and he doesn't want to go to the hospital" and just leave me to deal with a now pissed off addict.