>>509731452Chop the dried shrooms to little pieces and soak in lemon juice for 20-30 minutes, then drink it.
The citrus acid dissolves the psilocybin into psilocin so your stomach doesn't have to do that. The effect will be stronger and a little shorter, and usually no nausea at all.
The nausea comes from a pH imbalance in your stomach, but the imbalance won't be as stark when your stomach doesn't have to break the psilocybin and because of the lemon juice.