Definitely memorize the top 20-50 drugs prescribed. I used some pharm tech study book and literally wasted so much time studying mediocre things from that book. All you need to know is basic math calculations (ratios, percents, decimals, 1-2 equations for pediatric dosages), drug laws (lots of HIPAA type questions), and the rest were drug names. I didn't know any of the drug names since I never worked in a pharmacy, but I still passed because I aced the math part. Also memorize some basic pharm words such as QID, BID, those types of abbreviations. Good luck!