You can find free case study questions by going to http://www.evolve.elsevier.com
, searching for your pharmacology book in your program (mine uses Lilley Pharmacology and the Nursing Process 7th Edition), find the free one, click to register for the text book, and check out. In the home screen it will show you all the books you have. Simply click on one, click the chapter you want to review, click student resources, then click the prepare for exams link. You'll have to make an account if you don't already have one. That website comes in handy.