RxClass API
The RxClass API is a web service for accessing drug classes and drug members for a number of different
drug class types. No license is needed to use the RxClass API. | Note: Please check the Terms of Service for restrictions on using the APIs. |
The API can be accessed by clients in two different ways: Overview of RxClass.
Functions and Resources
In the table, the base URI (https://rxnav.nlm.nih.gov/REST/rxclass
) for the REST resources has been omitted to improve readability. | SOAP Function | REST Resource | Description |
|---|---|---|
| findClassById | /class/byId | Find a drug class from a class identifier |
| findClassByName | /class/byName | Find drug classes from a class name |
| findSimilarClassesByClass | /similar |  Find similar class membership |
| findSimilarClassesByDrugList | /similarByRxcuis | Find similar classes from a list of RxNorm drug identifiers |
| getAllClasses | /allClasses | Get all drug classes |
| getClassByRxNormDrugId | /class/byRxcui | Get the classes of a specified drug identifier |
| getClassByRxNormDrugName | /class/byDrugName | Get the classes of a specified drug name |
| getClassContexts | /classContext | Get the class context |
| getClassGraph | /classGraph | Get the class graph of ancestors |
| getClassMembers | /classMembers | Get the drug members of a specified class |
| getClassTree | /classTree | Get the descendents of a class |
| getClassTypes | /classTypes | Get the class types |
| getRelas | /relas | Get the relationships for a source of drug relations |
| getSimilarityInformation | /similarInfo | Get the similarity information between members of two classes |
| getSourcesOfDrugClassRelations | /relaSources | Get the sources of drug-class relations |
| getSpellingSuggestions | /spellingsuggestions | Get spelling suggestions for a drug or class name |