# RxNorm drug nomenclature

Source: https://onco.cc/terms/rxnorm/  
OnCo record `rxnorm` (Term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

RxNorm is the US National Library of Medicine's standard list of drug names and codes, linking brand, generic and dose forms so that the same medicine is recognised across records.

## Summary

RxNorm is a US terminology containing all medications on the US market, part of the Unified Medical Language System and maintained by the National Library of Medicine (Wikipedia). Each concept (RxCUI) ties together ingredient, strength, dose form and brand, and maps to other drug vocabularies such as NDC codes and, through UMLS, to NCIt. Treatment histories drawn from electronic records need it to turn free-text drug names into features.

## Fields

- Kind: Term
- Last checked: 2026-09-24
- Also known as: RxNorm; RxNorm code; RxCUI; RxNorm concept; normalised drug names
- Tags: cansim-terms

## Notes

- Listed in the CanSim terms map 1.0.0 (docs/onco/terms.json, generated 2026-09-24), CC BY 4.0, attribution: CanSim project, an open, public-data-first cancer foundation-model programme; CanSim page path /terms/rxnorm.

## Sources

- Wikipedia: https://en.wikipedia.org/wiki/RxNorm
- RxNorm (US National Library of Medicine): https://www.nlm.nih.gov/research/umls/rxnorm/index.html
- Wikipedia: https://en.wikipedia.org/wiki/RxNorm

## Connected records

- terms: [Cancer AI vocabulary (CanSim terms map)](https://onco.cc/terms/cancer-ai-vocabulary/), [Clinical text: EHR notes and pathology reports](https://onco.cc/terms/ehr-text-pathology-reports/), [NCI Thesaurus (NCIt)](https://onco.cc/terms/ncit/)

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JSON: https://onco.cc/api/v1/entities/rxnorm.json