Aspirin irritates the stomach, alcohol irritates the stomach.... not a good mix.
Listen to the voice of experience.
Beer & pizza good, hangover is the body going through alcohol withdrawl and dehydration. The same enzymes that metabolize alcohol also work with grease. The water will help with dehydration.
I always have a 2L bottle of water beside me. I have to wake up and drink every hour or so because my throat gets so dry and I can't swallow or breathe properly.