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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Subscriber Resources

Highlights & Features

The 2021 edition features the latest drug name updates and information, including:

  • 6,326 United States Adopted Names (USAN) - 320 are new
  • 13,188 nonproprietary drug name entries
  • 3,701 brand names
  • 15,369 Unique Ingredient Identifier (UNII) codes
  • 7,766 code designations, including 402 Cancer Chemotherapy National Service Center (NSC) numbers
  • 16,423 Chemical Abstract Service (CAS) registry numbers
  • 10,726 graphics
  • 316 new pronunciations

Subscription Information

  • USP Dictionary updates and revisions are published annually each January.
  • Subscriptions are available exclusively in online format, valid for 12 months from date of activation.

Benefits & Applications

The USP Dictionary helps to:

  • Ensure official compliance in product labeling in order to obtain new drug approval and to avoid "misbranded" products
  • Determine established generic drug names to use in advertising and labeling as required by U.S. federal law
  • Preserve trademark rights to drug brand names by using proper generic names
  • File accurate and acceptable INDs, NDAs, and ANDAs
  • Avoid errors in reports, correspondence, articles, and package inserts
  • Verify names and spellings of materials used in laboratory research
  • Group drug products into families
  • Determine exact chemical structures and compositions
  • Avoid serious verbal medication errors

An Essential Reference for

  • Scientists and professionals working in pharmaceutical and related industries, specifically regulatory affairs, quality control, and quality assurance
  • Libraries and schools of medicine and pharmacy
  • Pharmacists, nurses, and other healthcare professionals who need to pronounce and spell drug names correctly