Are you using Epocrates? Make sure to update regularly. Here's a summary of some recent updates on Epocrates:
32 new drug monographs
586 drug monographs edited
472 drug-drug interaction edits
There's simply no way we can keep up with all the changes in the evolving world of pharmacology. New drugs are being approved. Old drugs are turning generic. New warnings are being added. Some drugs are getting pulled off the market.
If you're using Epocrates, make sure to leverage their Mobile Resource Centers.