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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

October Release - 10/03/2011

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 technical documentation.


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

Source NameSABDate Updated
Gold Standard Alchemy GS 09/07/2011
Medi-Span Master Drug Data Base MDDB 09/07/2011
Multum MediSource Lexicon MMSL 09/01/2011
Micromedex RED BOOK MMX 09/06/2011
FDA Structured Product Labels MTHSPL 09/21/2011
First DataBank NDDF Plus Source Vocabulary NDDF 09/07/2011
Veterans Health Administration National Drug File - Reference Terminology NDFRT 10/03/2011
Veterans Health Administration National Drug File VANDF 08/24/2011


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 07/31/2011


Data Changes

The October release includes a transformed and systematized version of the RxTerms drug interface idea, which organizes RxNorm drug names into additional forms useful for medication data entry. The RxNorm implementation includes three new DFG, SCDG, and SBDG (doseform group) term types. Some examples of these doseform group term type names include Nasal Product (DFG), Lidocaine Topical Products (SCDG), and Valium Pills (SBDG). SCDGs and SBDGs have attributes that list all of the strengths available at the SCD/SBD level. For example, the Valium Pills SBDG has attribute values for each of the three SBDs that this Semantic Branded Doseform Group includes - 2 MG, 5 MG, and 10 MG. SCDGs and SBDGs have relationships to each of their SCD/SBD counterparts. The corresponding SCD/SBD for each SCDG/SBDG will also have an ATN=RXN_AVAILABLE_STRENGTH attribute with only one value (ATV) for its particular strength. This addition to RxNorm is intended to be used with the Current Prescribable Content subset for easy-to-use displays in medication software applications. More information on these additions can be found in the RxNorm technical documentation, including a list of all DFG values.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 316
Active BPCK forms 393
Active SCD forms 20,098
Active SBD forms 17,020
Active RXNORM MIN atoms 3,698
Active RXNORM IN atoms 5,001
Active RXNORM PIN atoms 1,569
Active RXNORM BN atoms 15,415
Active RXNORM DF atoms 100
Active RXNORM DFG atoms 21
Obsolete GPCK forms 68
Obsolete BPCK forms 41
Obsolete SCD forms 13,254
Obsolete SBD forms 3,891
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 288,934
Source-asserted NDC codes 1,032,229
Distinct Source-asserted NDC codes 485,106
SAB=RXNORM NDC codes 249,454
Distinct SAB=RXNORM NDC codes 249,454

Last Reviewed: October 5, 2011