<P> Prescription and over-the - counter medicines available in the United States must, by federal law, meet USP - NF public standards, where such standards exist . Many other countries use the USP - NF instead of issuing their own pharmacopeia, or to supplement their government pharmacopeia . </P> <P> USP's standards for food ingredients can be found in its Food Chemicals Codex (FCC). The FCC is a compendium of standards used internationally for the quality and purity of food ingredients like preservatives, flavorings, colorings and nutrients . While the FCC is recognized in law in countries like Australia, Canada and New Zealand, it currently does not have statutory recognition in the United States, although FCC standards are incorporated by reference in over 200 FDA food regulations . USP obtained the FCC from the Institute of Medicine in 2006 . The IOM had published the first five editions of the FCC . </P> <P> USP also conducts verification programs for dietary supplement products and ingredients . These are testing and audit programs . Products that meet the requirements of the program can display the USP Verified Dietary Supplement Mark on their labels . This is different from seeing the letters "USP" alone on a dietary supplement label, which means that the manufacturer is claiming to adhere to USP standards . USP does not test such products as it does with USP Verified products . </P> <P> In the past, Congress authorized the Secretary of HHS to request USP to develop a drug classification system that Medicare Prescription Drug Benefit plans may use to develop their formularies, and to revise such classification from time to time to reflect changes in therapeutic uses covered by Part D drugs and the addition of new covered Part D drugs . USP has developed six versions of the Model Guidelines, the last issued early in 2014 for the 2015--2017 benefit years . </P>

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