As another commenter noted, some people have trouble with nausea when taking shrooms. If you're in this camp, I'd recommend exploring O-Acetylpsilocin (aka 4-Ac

As another commenter noted, some people have trouble with nausea when taking shrooms. If you're in this camp, I'd recommend exploring O-Acetylpsilocin (aka 4-AcO-DMT), which is widely thought to be a prodrug for psilocin, and much easier to synthesize than psilocybin to boot--and note that psilocybin is a prodrug for psilocin too, after all. Having explored both fairly extensively, I think O-Acetylpsilocin holds a lot fewer surprises than shrooms. I expect that pure psilocybin would behave similarly, but I haven't experienced it.