So, why does alcohol make you throw up? I heard that our body might be having a memory associated expulsion of something it recognizes as having been offensive before, in your case, it’s throwing up after drinking. Sometimes your body will have an immediate and involuntary reaction to something it couldn’t handle before or that it remembers as being connected to a bad experience. I used to be able to drink tequila with no problem, although I was never a big fan of it, until I got extremely drunk on tequila one night and ended up vomiting. That particular experience was the worst drinking related illness I’ve ever had. Now every time I taste or even smell tequila, it makes my stomach turn, and I instantly want to vomit. I’ve taken this as a sign that my body remembers how awful that night was just as much as my mind does. So occasionally, certain kinds of alcohol or even all alcohol might become unappealing and cause vomiting because of a bad experience with it.