Do you have gluten sensitivity? I found through elimination/re-introduction that I cannot drink any spirits that are made from gluten-containing grains without getting diarrhea.

If you Google the subject, there's heated debate; some people argue that the distillation process removes all traces of gluten, but there's lots of other folks like me posting out there saying that gluten-grain-based spirits are a big NO. I was so sad when I realized I couldn't drink Scotch or Bourbon anymore. Alas.

Try potato vodka. Luksusowa is a brand that a lot of bars carry and shouldn't be that expensive. Or, if you want to splurge, Ciroc, a higher-end grape vodka. That stuff is so yummy just sipped neat or on the rocks.

With the wine, you are running afoul of the modern tendency to try and kill every bacteria dead. They put sulfur in wine. Some is present naturally, but they add more because it helps them achieve a level of consistency. You'll see wine made with organic grapes- these have a little less sulfur. Organic wines aren't supposed to have any added at all; the industry finds this an extremely risky thing to do.

Anyway, both sulphur and alcohol have anti-bacterial effects, and diarrhea is a symptom of some of the bacteria in your gut dying.

The sugar + alcohol combination isn't good either, but it is more likely to make you dizzy and cause puking.

your body considers alcohol a toxin. therefore, when it's in your body, it will want to get rid of it. this is often through any form of bodily excrement.

just a question out of curiosity - is alcoholism prevalent in your family? i know that it is in mine and i have always had the same problem with diarrhea that you are describing in the same evening or early next morning of drinking..none of my friends have this problem. i've read that this is common in people who have a line of alcoholics in their family because your body will react to alcohol in similar ways that it would in an alcoholic (as if you were one, even though you aren't), and diarrhea is very common in alcoholics after they drink.

i've also found that sticking to one specific drink that is low in sugar (so no sugary juices or mixes) helps minimize this effect for me. it also helps for me to just drink the same type of alcohol all night instead of mixing them (if i'm drinking clear liquor then no dark alcohol in the same night..this is also a rule my dad told me a few years ago, hahaha).

hope this helps!

Alcohol itself is a gut irritant. I know when I've had a big night out what comes out the other end is usually somewhat ugly.

Not sure what the deal is with Vodka Mate (I've never heard of it) being the worse offender, though it's possible it's due to the vasoconstricting effect of the caffeine speeding up bowel movements.