It’s amazing what the body can put up with - the likes of Ronnie Wood, Ozzy Osbourne, Gene Simmons, etc should have been dead decades ago based on their substance abuse.
Isn't Gene Simmons quite a puritan in everything but sex ?
Anyway, the dirty secret is almost all "drug" deaths aren't exactly. If you can get a good supply of decent shit, then you're fairly safe. It's only when you have to go to the street - where goodness knows what gets cut with I dread to think - that you start getting the sad sordid death of a junky. I am firmly of the opinion that prohibition - the "cure" - has been responsible for far more deaths than the "illness". Thank you Mr. Nixon.