Find Similar Classes By Drug List

Find classes with clinically-significant RxNorm ingredients similar to a specified list of drug identifiers.

byRxNav (RxNorm Drug Names API)

300+calls

N/Alatency

Updated: Oct 27, 2026, 12:40 AM

Continue setup in your AI

Only public catalog IDs and a safe return path are handed to the Plugins page. This does not run the tool or confirm current availability, authorization, price, limits, or upstream status; those conditions are checked again before execution.

Selected tool: rxnav.rxclass.similar_classes_by_drug_list.retrieve.v1.ba199309
Provider scope: RxNav (RxNorm Drug Names API)
Catalog updated: 2026-10-27T00:40:01.989419+00:00
Business task: Pending verification

Continue setupYou can return to this tool page if the selection is incomplete or expires.

Run on this page: Execute is the in-site test path. Continue setup is for adding the public selection to an external AI; the two paths are tracked and validated separately.

Discover -> Inspect -> Call

Call setup

Tool IDrxnav.rxclass.similar_classes_by_drug_list.retrieve.v1.ba199309

Request parametersJSON

Before this Call

1 credit / call

The final charge is settled from actual provider usage and will appear in Usage.

Field reference

formatstringOptional

Notation for results

rxcuisstringRequired

RxNorm drug identifier(s) (Space-separated list. At most 500 items.)

relaSourcestringOptional

Source of drug relations to search (See getSourcesOfDrugClassRelations for the menu.)

relastringOptional

Relationship of the drug class to its members (See getRelas for the menu.)

scoreTypestringOptional

Ranking of results: 0=Parameter class Equals result classes, 1=Parameter class Includes result classes, 2=Parameter class Included-in result classes

topintegerOptional

Coarse control over number of results to return (Range: 1 to 100.)

equivalenceThresholdnumberOptional

Minimum of equivalence scores to return (Range: 0.0 to 1.0.)

inclusionThresholdnumberOptional

When ranking by inclusion score: Minimum of (absolute value of) inclusion scores to return (Range: 0.0 to 1.0.)

Continue setup in your AI

Selected tool

rxnav.rxclass.similar_classes_by_drug_list.retrieve.v1.ba199309

Provider scope

RxNav (RxNorm Drug Names API)

Catalog updated

2026-10-27T00:40:01.989419+00:00

Business task

Pending verification

Continue setupYou can return to this tool page if the selection is incomplete or expires.