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

RxClass Similar Classesnew

A new feature in RxClass lets users see similar classes to the one selected. In addition, the RxClass API has new functions that retrieve similar classes. More details on similar classes.

RxClass API added to RxMix

The RxClass API functions have been added to RxMix. The RxClass API is a web service for accessing drug classes and associated drug members.

Notice to API Users

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

Java 7 required for RxNav

Users who are currently running RxNav with Java version 6 will need to upgrade to Java 7 or greater sometime in the first quarter of 2015 when the next update to RxNav is expected.
API Usage RxNorm (February 2015) NDF-RT (February 2015)
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By Year: 2015 | 2014 | 2013 | 2012 | 2011