Oh, that guy. See this New York Times article from 1977.[1]
"Over the course of several years, Alpert claimed to have taken some 300 acid trips. Inevitably, the problem became one of facing the blandness of coming down.... Once, he says he and five others locked themselves in a building for three weeks and dropped 400 micrograms of LSD every four hours. Still; when the trip was over, it was over. Finished. Done. In “Be Here Now,” Ram Dass describes the pain: “It was as if you'd come into the kingdom of heaven and seen how it all is, and then you got cast out again.” Looking for a way to get up there and stay up there, maybe even without drugs ... Alpert split for India."
Today. tuned out, turned off, and dropped out of sight.
"Over the course of several years, Alpert claimed to have taken some 300 acid trips. Inevitably, the problem became one of facing the blandness of coming down.... Once, he says he and five others locked themselves in a building for three weeks and dropped 400 micrograms of LSD every four hours. Still; when the trip was over, it was over. Finished. Done. In “Be Here Now,” Ram Dass describes the pain: “It was as if you'd come into the kingdom of heaven and seen how it all is, and then you got cast out again.” Looking for a way to get up there and stay up there, maybe even without drugs ... Alpert split for India."
Today. tuned out, turned off, and dropped out of sight.
[1] https://www.nytimes.com/1977/12/04/archives/confessions-of-a...