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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

May Release - 05/05/2014

This release of RxNorm is consistent with the 2014AA 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 04/04/2014
Medi-Span Master Drug Data Base MDDB 04/09/2014
Multum MediSource Lexicon MMSL 04/01/2014
Micromedex RED BOOK MMX 04/07/2014
Medical Subject Headings (MeSH) MSH 02/10/2014
FDA Structured Product Labels MTHSPL 04/28/2014
FDB MedKnowledge (formerly NDDF Plus) NDDF 04/09/2014
Veterans Health Administration National Drug File - Reference Terminology NDFRT 05/05/2014
NDFRT FDASPL relationships NDFRT_FDASPL 05/05/2014
NDFRT FMTSME relationships NDFRT_FMTSME 05/05/2014
Veterans Health Administration National Drug File VANDF 03/19/2014


The following sources have not been updated in this release:

Source NameSABDate Updated
Anatomical Therapeutic Chemical Classification System ATC 2014
FDA National Drug Code Directory MTHFDA 06/01/2011
US Edition of SNOMED CT (drug information) SNOMEDCT_US 01/31/2014

Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCKs 347
Active BPCKs 427
Active SCDs 19679
Active SBDs 10873
Active RXNORM MINs 3887
Active RXNORM INs 9721
Active RXNORM PINs 2258
Active RXNORM BNs 6788
Active RXNORM DFs 103
Obsolete GPCKs 127
Obsolete BPCKs 111
Obsolete SCDs 14545
Obsolete SBDs 10315
Obsolete RXNORM MINs 0
Obsolete RXNORM INs 0
Obsolete RXNORM PINs 0
Obsolete RXNORM BNs 9282
Obsolete RXNORM DFs 51
Editor-suppressed SCDs 1067
Editor-suppressed SBDs 923
OCD atoms 328230
Source-asserted NDCs 1288935
Distinct source-asserted NDCs 581778
Distinct SAB=RXNORM NDCs 199946

Last Reviewed: May 5, 2014