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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

February Release - 02/06/2012

This release of RxNorm is consistent with the 2011AB 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 01/03/2012
Medi-Span Master Drug Data Base MDDB 01/04/2012
Multum MediSource Lexicon MMSL 01/01/2012
Micromedex RED BOOK MMX 01/03/2012
FDA Structured Product Labels MTHSPL 01/27/2012
First DataBank NDDF Plus Source Vocabulary NDDF 01/11/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 02/06/2012
Veterans Health Administration National Drug File VANDF 12/27/2011


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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 09/09/2011
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2011


Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 315
Active BPCK forms 404
Active SCD forms 20,614
Active SBD forms 17,125
Active RXNORM MIN atoms 3,729
Active RXNORM IN atoms 5,012
Active RXNORM PIN atoms 1,570
Active RXNORM BN atoms 15,611
Active RXNORM DF atoms 100
Obsolete GPCK forms 68
Obsolete BPCK forms 40
Obsolete SCD forms 13,056
Obsolete SBD forms 3,864
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 294,293
Source-asserted NDC codes 1,050,603
Distinct Source-asserted NDC codes 494,008
SAB=RXNORM NDC codes 257,295
Distinct SAB=RXNORM NDC codes 257,295

Last Reviewed: April 23, 2012