He added: "That's heart-stopping material right there. Like, 'Why am I still breathing?' Every morning, I woke up disappointed that I'd woken up."
The Go singer admitted the only drug he didn't take was heroin, but that was just because he "didn't know how to get it".
He said: "I liked to put anything I could into my body. I liked cocaine and crystal meth and a little bit of angel dust. Vicodin and red wine. Very pleasant. But not the brick-through-the-window excitement I craved.
"When somebody would say, 'Oh I've got really good ecstasy', that didn't interest me. When someone said, 'I bought ecstasy off a homeless guy and it smells like diarrhea', that's when the drug was very exciting.
"Bear in mind the hypocracy of it in that if I went to Whole Foods, I had to have organic blueberries. I wasn't going to buy the conventional ones."
The 53-year-old star — who has been sober since 2008 — has problems with his nose as a result of his drug abuse.
He said: "There's some soft tissue damage back there. Cocaine drip."