Albert Hofmann, the chemist who first made LSD and experimented with its effects on the mind, died aged 102 -- goes to show that at least this drug doesn't kill you. I still wouldn't try it though, being a control freak with respect to my mind.
Here is an obituary and a news story.
PS a few years ago, I very nearly translated a book of his, which would have been published on the occasion of his 100th birthday. I don't know what happened exactly, but I guess the publishers got cold feet because it was positive about drug induced experiences.