Is it okay to have rum, beer and brandy at the same time?

No. It's not okay. There's no law or rule against it, but it's stupid. You run the risk of alcohol poisoning, increase the likelihood of doing something that will harm or injure yourself or others while under the influence of alcohol, and make it likely that you'll experience a miserable “hangover. read more

The alcohol in each is the same kind, ethanol or ethyl alcohol, but other ingredients may not go together so well. A boilermaker is a beer with a shot of whiskey, so lots of people obviously drink those two in combination. read more

Take the Italian caffè corretto (which blends a shot of espresso with a small amount of Sambuca or a Grappa or other brandy), the Spanish carajillo (which adds rum to the list of accepted dosers), Irish coffee (which involves whiskey, sugar, and a thick layer of cream), or the numerous other cultural staples for caffeinated concoctions. read more