RxNav

RxNav News

The APIs and tools are updated monthly following the RxNorm release. The RxNorm release schedule can be found at RxNorm Overview.

November 2, 2026

RxClass (3.2.12), RxAPIs (3.1.357):

• RxClass has been extended to find classes for obsolete drug-product concepts. Details

June 1, 2026

RxClass (3.2.3):

• Usage of product-oriented classifications has been simplified. It is no longer necessary to choose "Show source data" to switch the view from ingredients to products.

February 2, 2026

RxNav, RxAPIs (3.1.344):

• RxNav, the "default paths" table, and API function getRelatedByType have been adjusted to ensure clinically-relevant links to and from precise-formulation term types SCDFP, SCDGP, and SBDFP. Details

August 4, 2025

RxClass:

• RxNav's ATC classification of RxNorm drug products ("ATCPROD") has been updated to ATC 2025.

May 5, 2025

RxAPIs (3.1.329):

• Added API function getRelaPaths. Given RxNorm start and end term types, returns the default path, thereby making default paths documentation programmatically accessible. Details

April 7, 2025

Upcoming changes:

• NDC property "DM_SPL_ID" will be removed on or after July 1, 2025, from RxNav and from the results of RxNorm API function getNDCProperties.

December 2, 2024

RxClass:

• Added CDC Vaccine Groups (CVX classes), encompassing RxNorm ingredients and branded and generic products.

Upcoming changes:

• It is expected that "Therapeutic Role" classes will be removed from RxClass, effective with the March 2025 release of RxNav, due to SNOMED CT's inactivation of therapeutic role groupers of Medicinal Products.

March 4, 2024

RxNav (2.9.156), APIs (3.1.276):

• The Graph view identifies branded products by their RxNorm Prescribable Name (PSN). The RxNorm API has been extended to offer the Prescribable Name as an option on the getAllRelatedInfo and getRelatedByType functions.

January 16, 2024

RxMix:

• RxMix has been updated to offer more features of the RxNorm API and produce standard tab-separated reports. Details

July 3, 2023

RxClass (3.1.110), APIs (3.1.254):

• Added class source ATCPROD, associating RxNorm drug products with ATC (level 1-4) drug classes. ATCPROD classes are shown in RxClass and RxNav. Details

RxNav (2.9.119):

• Collected RxNorm drug-concept information on an "RxCUI" tab, consolidating the former Properties and Status tabs. The narrowest ("mobile") view has been simplified by the removal of Classes and Interactions.

Upcoming changes:

• The Drug-Drug Interaction API will be discontinued on or about January 2, 2024. RxNav's Interactions tab will also be removed.

May 1, 2023

Upcoming changes:

• On or about August 7, 2023, RxNav concept properties concerning the ingredients or strength of individual drug components of SBD/SCD concepts will be removed. The corresponding information is reported more clearly by getRxcuiHistoryStatus. The concept properties that will be removed are flagged at getAllProperties.
• On or about November 6, 2023, MeSH codes and names will no longer be available or searchable in RxNav, and RxClass will no longer show MESHPA classes. These changes are in keeping with RxNorm, whose last release including MeSH will be the October 2023 release.

March 6, 2023

APIs (3.1.246):

• The RxNorm API's getRxcuiHistoryStatus function has been enhanced to reflect ongoing curation of the RxNorm vocabulary, support historical clinical analytics, and improve consistency of reports about concepts that were active at different times. Details
• RxNav's "default paths" table and API function getRelatedByType have been adjusted to use RxNorm's direct link from SCDF and SBDF to DF. With this change, RxNav shows a DF related to every SBDF or SCDF, even if there are no related active drugs.

November 7, 2022

APIs (3.1.225):

• The getApproximateMatch function returns the source and, if permissible, the name of each atom, in addition to the RxCUI and RxAUI as before. Names of atoms from RxNorm's restricted sources (SRL>0) are returned only if the request includes a UTS API key in good standing.
• RxNav's "default paths" table, which drives API functions including getRelatedByType, has been adjusted to improve bidirectional consistency of relations involving some branded term types. Details

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