GET /REST/rxcui/{rxcui}/related
Summary: Get related concepts
Operation ID: getRelatedConcepts
Auth: none
Operation ID: getRelatedConcepts
Auth: none
Description
Returns concepts directly related to a specified concept by relationship type or term type.
Parameters (3)
rela
(string, query, optional)
Relationship type (e.g., has_ingredient, has_dose_form)
rxcui
(string, path, required)
The RxNorm Concept Unique Identifier
tty
(string, query, optional)
Term type filter
Examples (3)
| Title | Type | URL | Action |
|---|---|---|---|
| Get all related concepts for a drug | curl |
https://rxnav.nlm.nih.gov/REST/rxcui/161/related |
|
| Get ingredients for a drug by relationship type | curl |
https://rxnav.nlm.nih.gov/REST/rxcui/213469/related?rela=has_ingredient |
|
| Get related concepts filtered by term type | curl |
https://rxnav.nlm.nih.gov/REST/rxcui/161/related?tty=IN |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 09:50:57.813785 | 200 | 563ms | |
| 2026-03-23 09:48:53.981196 | 200 | 560ms | |
| 2026-03-23 09:43:42.481902 | 400 | 560ms |
Response Changes
| When | Old | New |
|---|---|---|
| 2026-03-23 09:48:53.981196 | 3b795b17c490 |
52bc90998983 |
| 2026-03-23 09:50:57.813785 | 52bc90998983 |
ec5ead679c8c |