Grapefruit juice, antihistamines, many antacids. The list is very very long.
If you're an infrequent user and you're healthy mixing a drink or two with it will increase the buzz a lot. Don't make a habit of it, acetaminophen is bad for your liver and adding alcohol is like pouring alcohol on a fire. Cold water extraction is quick and easy. Crush the pill and put it in a little ice cold water then filter the shit that doesn't dissolve. You get like 99% of the goodies and get rid of most of the acetaminophen.