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Unified Medical Language System® (UMLS®)


RxNorm provides normalized names for clinical drugs and links its names to many of the drug vocabularies commonly used in pharmacy management and drug interaction software, including those of First Databank, Micromedex, MediSpan, Gold Standard, and Multum. By providing links between these vocabularies, RxNorm can mediate messages between systems not using the same software and vocabulary.

RxNorm now includes the National Drug File - Reference Terminology (NDF-RT) from the Veterans Health Administration. NDF-RT is a terminology used to code clinical drug properties, including mechanism of action, physiologic effect, and therapeutic category.

We welcome your comments

We are interested to learn how you are using RxNorm, how you think it could be improved, and any other comments or ideas. Please send your questions, suggestions, and comments to:

NLM Research and Development using RxNorm