Xorkoth
Bluelight Crew
LSD is very unlikely to cause vomiting. Some people vomit from mushrooms but personally I have never even had an upset stomach from them. I usually get a bit of a sour stomach from mescaline, particularly if in cactus form, and one time I did throw up. I have an iron stomach though, I haven't vomited from anything in a long time, usually I don't even get nauseous.