Timothy Leary's Dead
I went to college in the early 70s and my friends and I experimented with a number of illegal drugs. I didn't continue but some of my friends did. My current drugs of choice are caffeine, nicotine, and alcohol (coffee,cigars, and wine with an occasional Islay malt).
In my experience, it boils down to dosage. Large doses of LSD can mess you up but so can large doses of Tequila.
Lessons learned from this.
1) don't admit to it.
2) don't do if in management meetings.
3) remember that venture capitalism are interested in your company, not you.