You should have received a list of meds that NYP expects you to know for the med exam. Most of them are the basic drugs you will be dealing with on a daily basis, and should have handled during your clinicals. The questions on the med exam are no harder than the other med questions you have had up until know - so don't sweat it.The main thing is to check your math, and understand your meds. All the questions were multiple choice (I took it two years ago) and on a computer (at Presbyterian/68th St), they provided scratch paper, and the test didn't cover every last thing on the sheet. So don't worry, you'll do just fine.
Congratulations and good luck in your new job!