Here's what the Encyclopedia Galactica has to say about alcohol. It says that alcohol is a colorless volatile liquid formed by the fermentation of sugars and also notes its intoxicating effect on certain carbon-based life forms.
The Hitchhiker's Guide to the Galaxy als moentions alchol. It says that the best drink in existence is the Pan Galactic Gargle Blaster. It says that the effect of drinking a Pan Galactic Gargle Blaster is like having your brains smashed out by a slice of lemon wrapped round a large gold brick.