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Pharmacopeial Forum (PF)

PF is a free bimonthly online journal in which USP publishes proposed revisions to USP–NF for public review and comment.

New issues are posted online every two months at the beginning of the month. The comment period is 90-days and ends on the last day of the month (View current PF Publication and Comment Schedule).

Information Featured in PF

To make it easier for users to identify and respond to proposed changes to USP–NF standards, PF now contains only proposals for which USP is seeking public comment and information, including:

  • In-Process Revisions
  • Proposed Interim Revision Announcements (IRAs)
  • PDG Harmonization Proposals (Stage 4)
  • Stimuli Articles

Access PF Online (Please note: a one-time registration is required to access PF.)

In addition, PF provides access to previously published issues of PF Online dating back to 2002. Other information previously in PF, including official text (final IRAs), is now published on the,, or in other publications.

Where to Find Items Previously in PF

Click on the links below to access information now located on USP’s website: