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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

June Release - 06/04/2012

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 05/02/2012
Medi-Span Master Drug Data Base MDDB 05/02/2012
Multum MediSource Lexicon MMSL 05/01/2012
Micromedex RED BOOK MMX 04/30/2012
FDA Structured Product Labels MTHSPL 05/25/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 05/02/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 06/04/2012
Veterans Health Administration National Drug File VANDF 04/25/2012


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
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2012


Data Changes

This release of RxNorm includes a new attribute. The new RXTERM_FORM attribute provides dose form strings, many of which are abbreviated, that are useful for drug application interfaces. These attributes are associated with SCD and SBD concepts. For example, the SCD 'Diazepam 2 MG Oral Tablet' has an ATN=RXTERM_FORM attribute with a value (ATV) of 'Tab'.

This release also includes changes to the dose form groups (DFGs). The names of many of these groups have changed slightly (e.g. the addition of "Product" to the end of the string). There are also more than 20 new dose form groups, all of which are listed in Appendix 3. Changes to these DFGs have been propagated to the associated SCDGs/SBDGs. RXCUIs/RXAUIs for these concepts remain unchanged.

You can find more information about these changes in the RxNorm Technical Documentation.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 323
Active BPCK forms 407
Active SCD forms 20,767
Active SBD forms 17,007
Active RXNORM MIN atoms 3,749
Active RXNORM IN atoms 5,028
Active RXNORM PIN atoms 1,587
Active RXNORM BN atoms 15,837
Active RXNORM DF atoms 102
Obsolete GPCK forms 71
Obsolete BPCK forms 42
Obsolete SCD forms 12,967
Obsolete SBD forms 3,785
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 53
OCD atoms 298,224
Source-asserted NDC codes 1,069,096
Distinct Source-asserted NDC codes 503,603
SAB=RXNORM NDC codes 265,810
Distinct SAB=RXNORM NDC codes 265,810

Last Reviewed: June 12, 2012