It's very difficult to sleep under the influence of a moderate psilocybin dose. Or any other of the classic psychedelics for that matter, like LSD or mescaline.

It's very difficult to sleep under the influence of a moderate psilocybin dose. Or any other of the classic psychedelics for that matter, like LSD or mescaline. I'm not sure what the mechanism is but they definitely have a stimulant-like feel sometimes (especially LSD).