Might be the alcohol--or might be the mixers. Or both, of course.
Unless you are doing straight shots or something, most of the quantity is in the mixers, which are likely to be acidic and/or carbonated. One time, you could try just the mixers, no booze, and see what happens.
Didn't people with bad stomachs used to drink brandy in milk
THe last time I had severe stomache problems it due to alcohol I also had a TON of salsa right before I got drunk off my rocker. I had diarhea (diarrhea) for 5 days. Last night I had a ton of alcohol, I mixed everything wine beer and 5 different types of liquors. My stomache is killing me now but I think it's subsiding. Is this normal when mixing all types of drinks? And what is causing it?