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RxNorm is short for medical prescription normalized [1] [2]

RxNorm is US-specific terminology in medicine that contains all medications available on the US market.[1] It can also be used in personal health records applications.[citation needed] RxNorm is part of Unified Medical Language System (UMLS) terminology and is maintained by the United States National Library of Medicine (NLM).[2]

Concept types[edit]

RxNorm distinguishes different types of drug concepts. It has concepts for drug ingredients, clinical drugs or dose forms.


RxNorm only includes drugs that are approved in USA.


As of May 2017, NLM provides six APIs related to RxNorm.[3] There is also a web application called RxMix that allows users to access the RxNorm APIs without writing their own programs.[4]

RxNorm web viewer (RxNav)

See also[edit]


  1. ^ Bennett, Casey C. (2012). "Utilizing RxNorm to support practical computing applications: Capturing medication history in live electronic health records". Journal of Biomedical Informatics. 45 (4): 634–641. arXiv:1204.4093. doi:10.1016/j.jbi.2012.02.011. PMID 22426081.
  2. ^ "RxNorm Overview". U.S. National Library of Medicine. National Institutes of Health. 25 April 2017.
  3. ^ "APIs". RxNav. U.S. National Library of Medicine. Retrieved 27 May 2017.
  4. ^ "RxMix Tutorial". RxNav. U.S. National Library of Medicine. Retrieved 27 May 2017.

External links[edit]