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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

September Release - 09/07/2010

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 08/04/2010
Medi-Span Master Drug Data Base MDDB 08/04/2010
Multum MediSource Lexicon MMSL 08/01/2010
Micromedex DRUGDEX MMX 08/02/2010
FDA National Drug Code Directory MTHFDA 08/02/2010
FDA Structured Product Labels MTHSPL 08/27/2010
First DataBank NDDF Plus Source Vocabulary NDDF 08/06/2010
Veterans Health Administration National Drug File - Reference Terminology NDFRT 09/07/2010
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2010
Veterans Health Administration National Drug File VANDF 07/26/2010

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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/17/2009

Data Changes

This release includes a new term type (TTY), MIN. This TTY indicates a collection of base ingredients (i.e. the moiety without the salt). The concepts with MIN TTYs have relationships to the IN and SCD TTYs. In a small number of instances where an SCD contains two salt or isomer forms of the same ingredient (e.g. many of the SCDs associated with the BN 'Adderall'), the MIN name contains precise ingredients. In addition, such a concept with the MIN TTY includes relationships to the PIN and SCD (and possibly also IN) TTYs.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 287
Active BPCK forms 370
Active SCD forms 19,036
Active SBD forms 15,693
Active RXNORM MIN atoms 3,554
Active RXNORM IN atoms 4,905
Active RXNORM PIN atoms 1,533
Active RXNORM BN atoms 13,991
Active RXNORM DF atoms 100
Obsolete GPCK forms 44
Obsolete BPCK forms 13
Obsolete SCD forms 12,937
Obsolete SBD forms 4,018
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 264,301
Source-asserted NDC codes 567,296
Distinct Source-asserted NDC codes 345,298
SAB=RXNORM NDC codes 293,227
Distinct SAB=RXNORM NDC codes 293,227

Last Reviewed: September 10, 2010