Intervention Services Inc., is an addiction intervention service available in most states.  Their staff, although somewhat expensive,  will come to the problem.   The good news is that their resource rich website is free for anyone to view.  It displays clear  opinion and perspective on intervention protocol for many drugs including the dynamics of approaching addicts and their families.  Interestingly, the site has a feature about the A&E Intervention Show;  a useful perspective on the reality of intervention.  Here, also,  is a YouTube resource of A&E episodes.