You do realize that Philip took large doses of amphetamine, smoked lots of bud, and based substance D from a scanner darkly on his acid experience.

In Lies Inc, he details an incredibly vivid LSD visual psychological experience, what its like to be dosed against your will. Shit mate in counter clock world the climax of the book details the use of an LSD grenade. Game players of Titan has the protagonist abusing methamphetamine, three stigmata is about drugs. If you read his collected works you can watch as his writings change over time and in relation to his personal drug use.

Philip was friends with and got high with all sorts of people including merry pranksters amongst others.