RxNorm Files

The license agreement required for the RxNorm releases is available from: https://www.nlm.nih.gov/databases/umls.html.

The terms and conditions for using RxNorm data is available on the RxNorm Terms of Service page: https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html.

RxNorm Full Monthly Release April 7, 2025	RxNorm Weekly Updates
RxNorm_full_04072025.zip MD5 checksum: c1ebcd2563098dfa69f2755ee16feba0 Release Notes 04/07/2025 RxNorm Technical Documentation

Current Prescribable Content Monthly Release April 7, 2025	Current Prescribable Content Weekly Updates
RxNorm_full_prescribe_04072025.zip (no license required) MD5 checksum: 8bb8ceaeeebdb6db3fc8c7fd1e13d85a Release Notes 04/07/2025 Current Prescribable Content Documentation

RxNorm files are pipe-delimited text files in Rich Release Format (RRF) with the extension ".RRF". They do not require the use of the MetamorphoSys program provided with the UMLS Knowledge Sources Files. The character set of RxNorm release files is Unicode UTF-8. If you need assistance with these files, please e-mail the RxNorm team at: rxnorminfo@nlm.nih.gov. Please read the README file for the release, which is contained in the release zip package. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm Technical Documentation.

For users who wish to automate the download of the RxNorm releases, steps are available here: https://documentation.uts.nlm.nih.gov/automating-downloads.html. The RxNorm files are also available through generic URLs with the word "current" instead of specific dates. See below for examples.

https://download.nlm.nih.gov/umls/kss/rxnorm/RxNorm_full_current.zip
https://download.nlm.nih.gov/umls/kss/rxnorm/RxNorm_weekly_current.zip

RxNorm Previous Releases

RxNorm Release Archives for 2005-2023

Last Reviewed: March 5, 2025

Unified Medical Language System® (UMLS®)

RxNorm Previous Releases

Unified Medical Language System^® (UMLS^®)