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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

April Release - 04/07/2014

This release of RxNorm is consistent with the 2013AB 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 03/06/2014
Medi-Span Master Drug Data Base MDDB 02/21/2014
Multum MediSource Lexicon MMSL 03/01/2014
Micromedex RED BOOK MMX 03/03/2014
FDA Structured Product Labels MTHSPL 03/28/2014
FDB MedKnowledge (formerly NDDF Plus) NDDF 03/05/2014
Veterans Health Administration National Drug File - Reference Terminology NDFRT 04/07/2014
NDFRT FDASPL relationships NDFRT_FDASPL 04/07/2014
NDFRT FMTSME relationships NDFRT_FMTSME 04/07/2014
Veterans Health Administration National Drug File VANDF 02/24/2014


The following sources have not been updated in this release:

Source NameSABDate Updated
Anatomical Therapeutic Chemical Classification System ATC 2014
Medical Subject Headings (MeSH) MSH 08/19/2013
FDA National Drug Code Directory MTHFDA 06/01/2011
US Edition of SNOMED CT (drug information) SNOMEDCT_US 01/31/2014

Data Changes

NDFRT sub-sources:
The Veterans Health Administration (VHA) added two new sets of relationship data to NDFRT. RxNorm will include two new sources (SABs) - NDFRT_FDASPL and NDFRT_FMTSME - for these relationship data sets. NDFRT_FDASPL represents the pharmacologic classification indexing of the active ingredients in the Food and Drug Administration (FDA) Structured Product Labels (SPLs). NDFRT_FMTSME is a subset of NDFRT drug classifications and their hierarchies, which were designated by the Federal Medication Terminologies (FMT) subject matter experts. NDFRT_FDASPL and NDFRT_FMTSME are relationships-only sources, and they provide links between SAB=NDFRT entities. You can read more about the additional relationships in the NDFRT documentation.

Extended Release Enteric Coated Capsule/Tablet dose forms:
RxNorm will no longer use the 'Extended Release Enteric Coated Capsule' or 'Extended Release Enteric Coated Tablet' dose forms for SAB=RXNORM normalized names. SCD and SBD concepts previously applied this dose form now use the 'Enteric Coated Capsule' or 'Enteric Coated Tablet' dose forms. This change affects a total of 28 SCD and SBD concepts.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 343
Active BPCK forms 423
Active SCD forms 19674
Active SBD forms 10801
Active RXNORM MIN atoms 3886
Active RXNORM IN atoms 9673
Active RXNORM PIN atoms 2253
Active RXNORM BN atoms 6757
Active RXNORM DF atoms 103
Obsolete GPCK forms 130
Obsolete BPCK forms 111
Obsolete SCD forms 14617
Obsolete SBD forms 10311
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 9273
Obsolete RXNORM DF atoms 51
Editor-suppressed SCD forms 1067
Editor-suppressed SBD forms 913
OCD atoms 326889
Source-asserted NDC codes 1283536
Distinct Source-asserted NDC codes 579485
SAB=RXNORM NDC codes 198728
Distinct SAB=RXNORM NDC codes 198728

Last Reviewed: April 7, 2014