LSD in form of a pill. There is no mescaline in microdots. Mescaline is active in the 400mg range, a microdot doesn't weigh more than 10mg. You'd be hard pressed putting any psychoactive into a microdot.
I bought some microdots, but it turned out to be birth control pills. Damn, that sucks.
Dude, I ate 3 microdots and now I'm talking to a bottle of orange juice.