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Select RxNorm_full_MMDDYYYY.zip. The upload is chunked for the large archive, then the RxNorm import pipeline validates and stages the root rrf/RXNCONSO.RRF, rrf/RXNSAT.RRF, and rrf/RXNREL.RRF files before one atomic catalog publish.
Existing ATCPROD memberships are carried forward only for matching RxCUIs because the curated RxClass ATCPROD dataset is not included in the RxNorm release ZIP; new or changed concepts remain explicitly partial.