Skip Navigation Bar

Unified Medical Language System® (UMLS®)

RxNorm Release Notes

January Release - 1/02/2018

This release of RxNorm is consistent with the 2017AB 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 source versions in bold have been updated since the previous RxNorm release:

Source NameSABVersion
Anatomical Therapeutic Chemical Classification System ATC ATC_2017
Vaccines Administered CVX CVX_2017_11_01
DrugBank DRUGBANK DRUGBANK5.0_2017_11_30
Gold Standard Drug Database GS GS_2017_11_30
Multum MediSource Lexicon MMSL MMSL_2017_12_01
Micromedex RED BOOK MMX MMX_2017_11_27
Medical Subject Headings (MeSH) MSH MSH2018_2017_08_11
CMS Formulary Reference File MTHCMSFRF MTHCMSFRF_2014
FDA Structured Product Labels MTHSPL MTHSPL_2017_12_26
FDB MedKnowledge (formerly NDDF Plus) NDDF NDDF_2017_11_29
Veterans Health Administration National Drug File - Reference Terminology NDFRT NDFRT_2018_01_02
US Edition of SNOMED CT (drug information) SNOMEDCT_US SNOMEDCT_US_2017_07_31
Veterans Health Administration National Drug File VANDF VANDF_2017_11_08

*Reminder: As of October 2017, Medi-Span data will not be included in the RxNorm or UMLS releases. If you have questions, please contact:

Data Changes

12 HR versus 24 HR Timolol Products
Starting with the January 2018 release, single ingredient timolol products are represented using a “12 HR” or “24 HR” quantity factor to help distinguish generic timolol products dosed twice per day versus once daily, respectively.

The January release includes new active concepts for the following timolol representations:

SCD 1992303 12 HR Timolol 5 MG/ML Ophthalmic Solution
SBD 1992304 12 HR Timolol 5 MG/ML Ophthalmic Solution [Timoptic]
SBD 1992305 12 HR Timolol 5 MG/ML Ophthalmic Solution [Betimol]
SCD 1992299 24 HR Timolol 5 MG/ML Ophthalmic Solution
SBD 1992300 24 HR Timolol 5 MG/ML Ophthalmic Solution [Istalol]

Data Counts

Term Type or AttributeNumber
Active GPCKs377
Active BPCKs450
Active SCDs18341
Active SBDs10441
Active RXNORM MINs3966
Active RXNORM INs11582
Active RXNORM PINs2728
Active RXNORM BNs6077
Active RXNORM DFs116
Obsolete GPCKs167
Obsolete BPCKs142
Obsolete SCDs16868
Obsolete SBDs10665
Obsolete RXNORM MINs0
Obsolete RXNORM INs0
Obsolete RXNORM PINs0
Obsolete RXNORM BNs10010
Obsolete RXNORM DFs59
Editor-suppressed SCDs1723
Editor-suppressed SBDs1384
Distinct SAB=RXNORM NDCs231352