This Compliance Policy Guide (CPG) describes how we intend to exercise our enforcement discretion with regard to drugs marketed in the United States that do not have required FDA approval for marketing. This is a revision of a guidance of the same name that was issued in June 2006. The guidance has been revised to state that the enforcement priorities and potential exercise of enforcement discretion discussed in the guidance apply only to unapproved new drugs (including new drugs covered by the Over-the-Counter (OTC) Drug Review), except for licensed biologics and veterinary drugs, that are commercially used or sold2 prior to September 19, 2011.