Tammy, It's complicated unless you've been a alcoholic or addict yourself. We who are addicts have submerged ourselves in the bottle for so long and know it's tendency to remove our pain. Reality sucks quite often. Normal people never having a shield or blanket covering them have learned how to appropriately deal with hardships addicts have a addiction to cover those pains. Nothing gets addressed because it can be done tomorrow. Resist help because we feel better at the moment.
The only person that can stop this downward slide is the addict. Anything you attempt to do will be seen as a potential person to fill a void (feel sorry for me, Take me to the dealer or bottle store) otherwise they will have nothing to do with you. My best advice is to let them sort out there issue. Yes, That might mean death with you standing quietly watching but that's all that can be done. It's the addict who makes the decision and at this moment, Your addict knowing the consequences fully has chosen death.
"The truth will set you free, but not before it pisses you off."