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USP Dictionary

The USP Dictionary of United States Adopted Names (USAN) and International Drug Names is the leading reference for nonproprietary drug names and chemical structures. In addition to USANs, the USP Dictionary provides International Nonproprietary Names (INNs), British Approved Names, Japanese Accepted Names, brand names, Unique Ingredient Identifier (UNII) codes, manufacturers, official USP–NF names, molecular weights, graphic formulas, pharmacologic and/or therapeutic categories, and pronunciations.

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