United States Pharmacopoeia Free Download
USP NF Free Download 
United States Pharmacopoeia / NF Free Download 
United States Pharmacopoeia 32 / National Formulary 27 Free Download
The United States Pharmacopeia–National Formulary and its Supplements become official six months after being released to the public. The USP–NF, which is released on November 1 of each year, becomes official on May 1 of the following year.
This  change was adopted to give users more time to bring their methods and  procedures into compliance with new and revised USP–NF requirements.
The  table below describes the new official dates. The 2008 USP31–NF26, and  the Supplements and Interim Revision Announcements (IRAs) to that  edition, will be official until May 1, 2009, at which time the  USP32–NF27 becomes official.
United States Pharmacopoeia Free Download
USP NF Free Download 
United States Pharmacopoeia / NF Free Download 
United States Pharmacopoeia 32 / National Formulary 27 Free Download
