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Unified Medical Language System® (UMLS®)

RxNorm Current Prescribable Content Release Notes

March Release - 03/04/2013

This RxNorm Current Prescribable Content release is consistent with the 2012AB UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm Technical Documentation.

Data Changes

The active ingredient for extended release drugs formerly listed as metoprolol tartrate has been changed to metoprolol succinate. Previously, the basis of strength substance (BoSS), metoprolol tartrate, was used in the normalized name for these drugs. Beginning with this release, the normalized names will now use metoprolol succinate instead. RXCUIs for these concepts will not change; however, the RXAUIs for the normalized names will change.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 272
Active BPCK forms 352
Active SCD forms 15,646
Active SBD forms 9,145
Active RXNORM MIN atoms 1,571
Active RXNORM IN atoms 4,255
Active RXNORM PIN atoms 1,146
Active RXNORM BN atoms 5,919
Active RXNORM DF atoms 100
Source-asserted NDC codes 125,032
Distinct Source-asserted NDC codes 105,858
SAB=RXNORM NDC codes 179,516
Distinct SAB=RXNORM NDC codes 179,516

Last Reviewed: March 4, 2013