Cannabis is what I'd personally go for if I wanted to avoid vomiting caused by alcohol, though you have to be careful with the dosage to avoid growing sleepy midway or raising your anxiety level instead. When you hit the sweet spot, you should feel a mild positive buzz and maybe a tiny bit tipsy.
You could also try doing practice runs with something like cut-up vitamin tablets (to simulate AE tablets) and salt water to grow mentally used to the process.