Depends on where you get the Psilocybin from. Search "Magic Truffles"
I never said it does.
> will make you very sick before making you fly.
I've used a.muscaria twice, from a reputable source (no self plucking). It never made me sick. It is perfectly safe to use. It did make me pee a lot, and my pee stank. Back when I bought it, it was legal to buy the powder in The Netherlands. I don't know about the legal state as it is.
Never tried them myself, but a friend did and he did experience the fairly common symptoms of severe nausea and falling asleep before having a very good trip.