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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

August Release - 08/01/2011

This release of RxNorm is consistent with the 2011AA UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm Documentation.


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

Source NameSABDate Updated
Gold Standard Alchemy GS 07/10/2011
Medi-Span Master Drug Data Base MDDB 07/06/2011
Multum MediSource Lexicon MMSL 07/01/2011
Micromedex RED BOOK MMX 07/05/2011
FDA Structured Product Labels MTHSPL 07/25/2011
First DataBank NDDF Plus Source Vocabulary NDDF 07/06/2011
Veterans Health Administration National Drug File - Reference Terminology NDFRT 08/01/2011
Veterans Health Administration National Drug File VANDF 07/11/2011


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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 02/14/2011
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2011


Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 315
Active BPCK forms 388
Active SCD forms 19,387
Active SBD forms 16,788
Active RXNORM MIN atoms 3,666
Active RXNORM IN atoms 4,987
Active RXNORM PIN atoms 1,568
Active RXNORM BN atoms 15,292
Active RXNORM DF atoms 100
Obsolete GPCK forms 65
Obsolete BPCK forms 43
Obsolete SCD forms 13,767
Obsolete SBD forms 3,979
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 55
OCD atoms 281,257
Source-asserted NDC codes 811,609
Distinct Source-asserted NDC codes 436,865
SAB=RXNORM NDC codes 238,886
Distinct SAB=RXNORM NDC codes 238,886

Last Reviewed: August 1, 2011