> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/getting-started/rxnorm.md).

# Search RxNorm in Duaer

In Duaer, look up RxNorm drug names via NLM RxNav with Duaer Data. One successful search uses 1 credit. This page includes the full English call skill.
## What you get

RxNorm in the Duaer data market returns drug names and RxCUI ids. One successful search uses 1 credit.

Add the node from the [Duaer Data category](/getting-started/duaer-data.md) (RxNorm), or copy the skill on the [data market](/getting-started/data-market.md). Related: [Compounds](/getting-started/compounds.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then RxNorm.
2. Enter Words (a new node starts with aspirin), or RxCUI.
3. Limit defaults to 10, max 20. Select Execute step.

A successful search uses 1 credit. Production deliverables land in the [data pool](/getting-started/data-pool.md).

## Call the API

- GET https://api.duaer.com/v1/data/rxnorm?...
- Authorization: Bearer <Duaer key>
- words or id is required.

For keys, refer to [Authentication for the Duaer public API](/api/authentication.md). Below is the same English call skill as Copy skill.

## Call skill

Same text as Copy skill on the Duaer data market. Keep it English.

```
---
name: duaer-rxnorm
description: >-
  Look up drug names through Duaer via RxNorm (NLM RxNav).
  One successful search uses 1 Duaer credit.
---

# Duaer RxNorm

Look up RxNorm drug concepts through Duaer with a Duaer key (NLM RxNav).

## Call

`GET https://api.duaer.com/v1/data/rxnorm?words=aspirin&limit=10`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `id` (or both; id wins).

- `words` — drug or ingredient name.
- `id` — optional. RxNorm concept id (RxCUI). Overrides words when set.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `rxcui`, `tty`, `synonym`, and `score`.
Related compounds: https://skills.duaer.com/compounds.md.
Related drug labels: https://skills.duaer.com/drug-labels.md.

## Credits

One successful search uses 1 credit.
An empty search, a failed search, a compound that matches nothing, or no remaining credits uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

```
## Questions

### How do Duaer RxNorm differ from Compounds?

RxNorm normalizes drug names to RxCUI. Compounds search PubChem small molecules.

## Related

- [Search compounds in Duaer](https://doc.duaer.com/getting-started/compounds.md)
- [Search drug labels in Duaer](https://doc.duaer.com/getting-started/drug-labels.md)
- [Search indications in Duaer](https://doc.duaer.com/getting-started/indications.md)
- [Use the Duaer data market](https://doc.duaer.com/getting-started/data-market.md)