For further resources, I again refer you to Life In The Fast Lane.
Personally, I found pharmacology very difficult. I had to do 100’s and 100’s of MCQ’s, and was still finding it hard to score well. Do lot’s of MCQ’s.
This is every MCQ I own. They are in no particular order, and they may repeat themselves. Some have answers, some don’t. For MCQ’s by topic, see Resources By Topic.
Brand New Practice 60 question MCQ paper (you shouldn’t have seen any of these questions before, as of August 2014)