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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

August Release - 08/06/2012

This release of RxNorm is consistent with the 2012AA 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.


The following sources have been updated since the previous RxNorm release:

Source NameSABDate Updated
Gold Standard Drug Database GS 07/05/2012
Medi-Span Master Drug Data Base MDDB 07/04/2012
Multum MediSource Lexicon MMSL 07/01/2012
Micromedex RED BOOK MMX 07/02/2012
FDA Structured Product Labels MTHSPL 07/30/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 07/11/2012
Veterans Health Administration National Drug File VANDF 06/27/2012


The following sources have not been updated since the previous RxNorm release:

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 02/01/2012
FDA National Drug Code Directory MTHFDA 06/01/2011
Veterans Health Administration National Drug File - Reference Terminology NDFRT 07/02/2012
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2012


Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 330
Active BPCK forms 413
Active SCD forms 20,764
Active SBD forms 16,718
Active RXNORM MIN atoms 3,766
Active RXNORM IN atoms 5,042
Active RXNORM PIN atoms 1,659
Active RXNORM BN atoms 15,923
Active RXNORM DF atoms 103
Obsolete GPCK forms 76
Obsolete BPCK forms 47
Obsolete SCD forms 13,049
Obsolete SBD forms 4,081
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 52
OCD atoms 300,654
Source-asserted NDC codes 1,076,743
Distinct Source-asserted NDC codes 507,447
SAB=RXNORM NDC codes 214,523
Distinct SAB=RXNORM NDC codes 214,523

Last Reviewed: August 6, 2012