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RxNav, RxMix, RxClass and the RxNorm, RxTerms, NDF-RT, RxClass and Interactions APIs are resources developed by the National Library of Medicine.
For questions, comments or feedback about these resources, please contact us at RXNAVINFO@LIST.NIH.GOV.

Frequently asked questions

For questions about the RxNorm data, please contact

We are interested in hearing from you about your use cases so that we may develop and refine these resources.

We invite you to develop computer and mobile applications using National Library of Medicine (NLM) resources. We request that any application that makes use of NLM data include the following statement:

"This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product."

Developers may not use the NLM name and/or logo in conjunction with their applications.