I took the exam in August and then again the last week of December and to me Rxprep was not enough for the new exam. I was thinking the new exam was going to be just like the old one but just more questions. It's not. The questions are harder/more in depth. The math was harder than rxprep well I had a lot of tpn questions that were not in rxprep. I did use prontopass math which had harder math questions but I skipped some of the harder ones bc I wasnt thinking they were going to be on the exam since the math on the old version was much easier. I wish I would have done all of them. First time I used only rxprep the second time I used passnaplex now, board vitals, rxprep book and prontopass math cards. The passnaplexnow helped me to identify drugs associated with disease states quickly so on the exam I could use process of elimination and it highlights the side effects pretty good but on the exam almost all of my SE questions were select all that apply. Fluids chapter is good at pointing out what drugs are compatible with what. I did pass but I had to use multiple sources.Compounding much harder on new format not sure what can actually help with those since they can't be found in rxprep 2016 version maybe the new book is better on that subject. Good luck!