ATTENTION: new policy on API usage effective December 15, 2014 - please check Terms of Service
  • RxNav

    RxNav is a browser for several drug information sources, including RxNorm, RxTerms and NDF-RT. RxNav finds drugs in RxNorm from the names and codes in its constituent vocabularies.

    Launch RxNav
    rxnav formview image ndfrt moa image rxnav simplified image mesh pa image mesh diazepam  image ndfrt drug image pill imageatc aspirin image atc ammonium image
  • APIs

    Application Program Interfaces (APIs) are available to users to retrieve data from several drug information sources, including RxNorm, NDF-RT and RxTerms.

    Currently there are six APIs available - RxNorm, Prescribable RxNorm, RxClass, NDF-RT RxTerms and Drug Interaction

    NDF-RT graph Dec 2014 rxnormapi call function Dec 2014
  • RxMix

    RxMix is a web application that allows users to combine functions from the RxNorm, NDF-RT and RxTerms APIs to create custom applications that can be run interactively or in a batch mode.

    rxmix flow imagerxmix output image
  • RxClass

    The RxClass Browser is a web application for exploring and navigating through the class hierarchies to find the RxNorm drug members associated with each class.

    rxclass browser imagerxclass selection image

RxNav brand names

Approximate Match Changes

The approximate match algorithm in the RxNorm API will be updated on June 1 to improve speed and accuracy. The algorithm is used in getApproximateMatch (REST: /ApproximateTerm). See details.
If you desire to try the functions with the updated algorithm before June 1, please contact us at RXNAVINFO@LIST.NIH.GOV.

Functions added to RxMix

Several functions have been recently added to RxMix:

Notice to API Users

We are pleased to report that API usage dramatically increased in 2014 and continues to increase in 2015. To accomodate the increased usage and our many new users, we have changed our Terms of Service

Java 7 required for RxNav

RxNav now requires Java version 7 or greater to run
API Usage RxNorm (April 2015) NDF-RT (April 2015)
By Year: 2015 | 2014 | 2013 | 2012 | 2011