Q: How up-to-date is RxNav?
A: RxNav is updated after each RxNorm monthly release. The RxNav "About" box shows the date of the RxNorm release that is in use.

Q: How can I reproduce the RxNav "graph" (or something similar)?
A: The getAllRelatedInfo function in the RxNorm API returns RxNorm concepts related to a specific concept.

Q: Why does NDC "xyz" appear in RxNav, while I do not see it in the RxNorm RXNSAT file?
A: The Historical NDC view in the NDC tab in RxNav may list NDCs that are no longer in the RxNorm RXNSAT file. NDC historical information is an added feature provided for RxNav and RxNorm API users.

Q: How can I find drug classes, such as "statins" or "beta blockers"?
A: RxNav is a drug-centric browser for RxNorm. To search by drug class, use RxClass.

Q: Why does my search find concepts that do not contain the word I searched for?
A: The RxNorm data set includes several vocabularies. RxNav searches all vocabularies in the RxNorm data set, but RxNav displays only the RxNorm vocabulary, which is a non-proprietary vocabulary developed by the National Library of Medicine.

Q: How can I download the RxCUIs that I see in RxNav?
A: You can get a comma-separated (CSV) file. Choose "Download" on the "RxNorm Graph" view.

Q: Can I search RxNav in bulk to get a list of results?
A: You can run a file of searches through RxMix.

Q: Why am I able to access the NDC tab for some concepts, but not others, such as atorvastatin (RxCUI 83367)?
A: Check the Term Type (TTY) of the selected concept in RxNav. The atorvastatin concept (RxCUI 83367) is an ingredient (its TTY is "IN"). NDCs are typically associated with medication products, which are RxNorm concepts whose TTY is "SCD", "GPCK", "SBD", or "BPCK".