I recommend the Davis's Drug Guide for Nurses. It's formatted like a dictionary..not a huge textbook. This drug guide was recommended by my old pharm/patho lecture. This is really great because its provides the drug's indications, action, pharmacokinetics (peak, onset, half-life), side effects, nursing implications and nursing assessments to do if a patient is on this drug.
I always use this when doing my patient research. It also comes with a CD-rom to install the drug guide onto your compuer. This saves A LOT of time when researching your meds for clinical or lecture. Good luck!
I use my Iphone epocrites whenever I'm in clinicals because I don't like to wear my lab coat and i especially don't want that chunky book in my pocket. I feel that you can find whatever information you're looking for on the internet. I bought davis drug guide, and downloaded the CD onto my computers to use for care plans but I just sold it because not once have I gotten it out and looked at it.
I have Nursing Central from Unbound Medicine, and that bundle includes the Davis Drug Guide. Have had no problems with it. Maybe I will get Epocrates, because Epocrates also lists drug-drug interactions.