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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

March Release - 03/02/2015

This release of RxNorm is consistent with the 2014AB 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 02/04/2015
Medi-Span Master Drug Data Base MDDB 02/04/2015
Multum MediSource Lexicon MMSL 02/01/2015
Micromedex RED BOOK MMX 02/02/2015
FDA Structured Product Labels MTHSPL 02/23/2015
FDB MedKnowledge (formerly NDDF Plus) NDDF 02/04/2015
Veterans Health Administration National Drug File - Reference Terminology NDFRT 03/02/2015
NDFRT FDASPL relationships NDFRT_FDASPL 03/02/2015
NDFRT FMTSME relationships NDFRT_FMTSME 03/02/2015
US Edition of SNOMED CT (drug information) SNOMEDCT_US 01/31/2015
Veterans Health Administration National Drug File VANDF 01/22/2015


The following sources have not been updated in this release:

Source NameSABDate Updated
Anatomical Therapeutic Chemical Classification System ATC 2015
Medical Subject Headings (MeSH) MSH 09/08/2014
CMS Formulary Reference File MTHCMSFRF 2014
FDA National Drug Code Directory MTHFDA 06/01/2011


Data Changes

RxNorm editors will no longer be creating branded forms (TTY=SBD) for over-the-counter cold, cough, and flu drugs that meet the following criteria:

  • have three or more ingredients
  • do not contain any of the following ingredients:
    • Codeine
    • Codeine phosphate
    • Hydrocodone
    • Hydrocodone bitartrate
  • contain at least two of the following ingredients (either base or precise):
    • Acetaminophen
    • Brompheniramine
    • Carbinoxamine
    • Chlorpheniramine
    • Dextromethorphan
    • Doxylamine
    • Guaifenesin
    • Phenylephrine
    • Phenylpropanolamine
    • Pseudoephedrine
  • do not have a SAB=MTHSPL label type of 'Human Prescription Drug Label'

NLM is deprecating certain semantic types that are infrequently used. Beginning with this release, RXCUIs that are categorized with these deprecated semantic types will be re-categorized with the parent semantic type. The table below lists the semantic types that will no longer exist as of this release as well as the replacement semantic type in each case. Please note that there are no new semantic types being created as a result of this effort.

Deprecated Semantic TypeReplacement Semantic Type
Neuroreactive Substance or Biogenic Amine Biologically Active Substance
Organophosphorus Compound Organic Chemical
Carbohydrate Organic Chemical
Lipid Organic Chemical
Steroid Organic Chemical
Eicosanoid Organic Chemical


Data Counts

Term Type or AttributeNumber
Active GPCKs 368
Active BPCKs 425
Active SCDs 20026
Active SBDs 10598
Active RXNORM MINs 3939
Active RXNORM INs 10417
Active RXNORM PINs 2400
Active RXNORM BNs 6448
Active RXNORM DFs 103
Obsolete GPCKs 125
Obsolete BPCKs 106
Obsolete SCDs 14597
Obsolete SBDs 9834
Obsolete RXNORM MINs 0
Obsolete RXNORM INs 0
Obsolete RXNORM PINs 0
Obsolete RXNORM BNs 9138
Obsolete RXNORM DFs 57
Editor-suppressed SCDs 1142
Editor-suppressed SBDs 983
OCD atoms 334216
Source-asserted NDCs 1340843
Distinct source-asserted NDCs 607089
Distinct SAB=RXNORM NDCs 203411

Last Reviewed: March 2, 2015