Some genotypes cause more gastritis (stomach inflammation) more than others. This can cause nausea.

Allergy. It is always possible to be allergic to something, but usually a person has to develop an exposure to the toxin before they develop the allergy.

Some medications do not work right in some folks, as an example, I used to take a medication to prevent angina and heart palpitations. It did the exact opposite and caused those things to be much worse.

So, it could just be your friends bio-diversity.
WashougalWonder Reviewed by WashougalWonder on . Marijuana and Consistent Vomiting: Solutions? My friend tried smoking twice, coughed pretty heavily, got nauseous, and ended up throwing up in the bathroom both times. We thought this was pretty bizarre and must be caused by the smoking process, so we tried baking cookies. I thought this would surely work for her, but it left her feeling horribly nauseous as well (on the verge of throwing up). Can somebody just be allergic to marijuana? This was all over a year ago, and we are lightly discussing trying it again, but I just don't Rating: 5