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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

September Release - 09/04/2012

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 08/01/2012
Medi-Span Master Drug Data Base MDDB 08/01/2012
Multum MediSource Lexicon MMSL 08/01/2012
Micromedex RED BOOK MMX 07/30/2012
FDA Structured Product Labels MTHSPL 08/28/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 08/01/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 09/04/2012
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2012
Veterans Health Administration National Drug File VANDF 07/27/2012


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


Data Changes

SAB=NDFRT relationships for disease-drug contraindications have been updated. Previously these disease-to-drug and drug-to-disease relationships used 'contraindicated_drug', which did not accurately reflect the relationship between these two entities. The disease-to-drug relationship is now 'has_contraindicated_drug', and the drug-to-disease relationship is now 'contraindicated_with_disease'. These relationships are included in the RXNREL.RRF file.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 330
Active BPCK forms 416
Active SCD forms 20,829
Active SBD forms 16,769
Active RXNORM MIN atoms 3,775
Active RXNORM IN atoms 5,054
Active RXNORM PIN atoms 1,690
Active RXNORM BN atoms 15,979
Active RXNORM DF atoms 103
Obsolete GPCK forms 76
Obsolete BPCK forms 47
Obsolete SCD forms 13,017
Obsolete SBD forms 4,084
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 301,194
Source-asserted NDC codes 1,084,139
Distinct Source-asserted NDC codes 512,797
SAB=RXNORM NDC codes 216,012
Distinct SAB=RXNORM NDC codes 216,012

Last Reviewed: September 4, 2012