Description

Gets pairs of active RxNorm concepts related by "reformulation_of".

Scope

Active: concepts in the current RxNorm data set that have an atom with SAB=RXNORM and SUPPRESS=N

Parameters

Note that HTTP requires that query parameters be "URL encoded". For full information on URL encoding, please refer to IETF RFC 3986, "Uniform Resource Identifier".

Output structure

Results are available as either XML or JSON.

• The XML result has the root element rxnormdata. It is described in the XML Schema for the RxNorm API; the relevant element structure is summarized below. Elements that would be empty might be left out.

• The JSON result is an object {...}, analogous to the content of the XML rxnormdata. Fields that might occur multiple times in the XML are expressed as an array. Fields that would be empty might be null or left out. Numbers are expressed as strings.

Both XML and JSON results follow the same outline:

rxnormdata

Root element in XML, or anonymous object in JSON

reformulationConceptList

pairs of original and reformulated concepts

reformulationConcept (array)

original concept and corresponding concept with new formula

rxcui

original RXCUI

reformulatedRxcui

RXCUI of new formula

name

original concept's name

reformulatedName

name of concept with new formula

Example: Reformulated concepts

XML: https://rxnav.nlm.nih.gov/REST/reformulationConcepts

JSON: https://rxnav.nlm.nih.gov/REST/reformulationConcepts.json

An XML result is shown below.

<rxnormdata>
    <reformulationConceptList>
        <reformulationConcept>
            <rxcui>1053155</rxcui>
            <reformulatedRxcui>2589792</reformulatedRxcui>
            <name>Baza-Protect</name>
            <reformulatedName>Baza-Protect Reformulated June 2020</reformulatedName>
        </reformulationConcept>
        <reformulationConcept>
            <rxcui>1087291</rxcui>
            <reformulatedRxcui>1425348</reformulatedRxcui>
            <name>Tineacide Antifungal</name>
            <reformulatedName>Tineacide Antifungal Reformulated Jun 2013</reformulatedName>
        </reformulationConcept>
        <reformulationConcept>
            <rxcui>152523</rxcui>
            <reformulatedRxcui>2607010</reformulatedRxcui>
            <name>Zantac</name>
            <reformulatedName>Zantac Reformulated Aug 2022</reformulatedName>
        </reformulationConcept>
        <reformulationConcept>
            <rxcui>217219</rxcui>
            <reformulatedRxcui>2120575</reformulatedRxcui>
            <name>Fungi-Nail</name>
            <reformulatedName>Fungi-Nail Reformulated Mar 2019</reformulatedName>
        </reformulationConcept>
        <reformulationConcept>
            <rxcui>218181</rxcui>
            <reformulatedRxcui>2600783</reformulatedRxcui>
            <name>Magonate</name>
            <reformulatedName>Magonate Reformulated May 2022</reformulatedName>
        </reformulationConcept>
        <reformulationConcept>
            <rxcui>794924</rxcui>
            <reformulatedRxcui>2174797</reformulatedRxcui>
            <name>Calagel</name>
            <reformulatedName>Calagel Reformulated Jun 2019</reformulatedName>
        </reformulationConcept>
    </reformulationConceptList>
</rxnormdata>