Read the school website, a book on interviewing, and this website. I also picked three current pharmacy issues and studied up. I went to the interview with notes - a list of questions, and printouts of the faculty bios. It impressed my faculty interviewer that I knew something about him. I also bought a suit, because business attire was specified. I was glad I did this. A few people were dressed a little too casually, and they were the ones with their heads down.
What was the most difficult question?
Your background is unconventional for pharmacy. How do you know you would succeed here?