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 Attribute	Number
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