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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

May Release - 05/03/2010

This release of RxNorm is consistent with the 2010AA 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 04/01/2010
Medi-Span Master Drug Data Base MDDB 03/31/2010
Multum MediSource Lexicon MMSL 04/01/2010
Micromedex DRUGDEX MMX 03/29/2010
FDA Structured Product Labels MTHSPL 04/26/2010
First DataBank NDDF Plus Source Vocabulary NDDF 04/02/2010
Veterans Health Administration National Drug File VANDF 03/29/2010

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

Source NameSABDate Updated
FDA National Drug Code Directory MTHFDA 03/01/2010
Medical Subject Headings (MeSH) MSH 08/17/2009
SNOMED Clinical Terms (drug information) SNOMED CT 01/31/2009

Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 277
Active BPCK forms 351
Active SCD forms 18,808
Active SBD forms 15,573
Active RXNORM IN atoms 4,848
Active RXNORM PIN atoms 1,520
Active RXNORM BN atoms 13,671
Active RXNORM DF atoms 100
Obsolete GPCK forms 37
Obsolete BPCK forms 12
Obsolete SCD forms 12,796
Obsolete SBD forms 3,958
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 55
OCD atoms 259,713
Source-asserted NDC codes 550,659
Distinct Source-asserted NDC codes 339,290
SAB=RXNORM NDC codes 285,835
Distinct SAB=RXNORM NDC codes 285,835

Last Reviewed: May 3, 2010