I struggled with medication when I prepared NCLEX. I used Kaplan book. In the back of the Kaplan book, there is a section just for medication. I think memorization and practicing are the ways to study the meds. When I took the NCLEX, I got many many meds questions (even herbs), but I saw them somewhere in Kaplan and its Q-bank or Sandure's CD. Talking about Kaplan, use their Q-bank (about $300, you don't have to sign on the class), it is very helpful. Good luck to you.