Others titles

  • New DDD Code 2019
  • New ATC Update and Alterations
  • New DDD Updates and Alterations


  • ATC Classification
  • ATC Alterations
  • DDD Alterations
  • New ATC
  • New DDD

Defined Daily Dose Codes for 2018 to 2019

This dataset contains the Defined Daily Dose (DDD) 2018 to 2019. In order to measure drug use, it is important to have both a classification system and a unit of measurement. To deal with the objections against traditional units of measurement, a technical unit of measurement called the Defined Daily Dose (DDD) to be used in drug utilization studies was developed.

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In 1981, the WHO Regional Office for Europe recommended the ATC/DDD system for international drug utilization studies. In connection with this, and to make the methodology more widely used, there was a need for a central body responsible for co-ordinating the use of the methodology. The WHO Collaborating Centre for Drug Statistics Methodology was accordingly established in Oslo in 1982. The Centre is now located at the Norwegian Institute of Public Health. The Norwegian government funds the Centre.

In 1996, WHO recognized the need to develop use of the ATC/DDD system as an international standard for drug utilization studies. The Centre was therefore linked directly to WHO Headquarters in Geneva instead of the WHO Regional Office for Europe in Copenhagen. This was seen as important to allow close integration of international drug utilization studies and WHO’s initiatives to achieve universal access to needed drugs and rational use of drugs particularly in developing countries. Access to standardized and validated information on drug use is essential to allow audit of patterns of drug utilization, identification of problems, educational or other interventions and monitoring of the outcomes of the interventions.

When the decision on globalizing the ATC/DDD system was taken, the WHO Division of Drug Management and Policies established the WHO International Working Group for Drug Statistics Methodology. The WHO Collaborating Centre for Drug Statistics Methodology receives expert advice from the Working Group.

About this Dataset

Data Info

Date Created


Last Modified




Update Frequency


Temporal Coverage


Spatial Coverage

United States


John Snow Labs; WHO Collaborating Centre for Drug Statistics Methodology;

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Source Citation



ATC Classification, ATC/DDD, ATC Alterations, DDD Alterations, New ATC, New DDD

Other Titles

New DDD Code 2019, New ATC Update and Alterations, New DDD Updates and Alterations

Data Fields

Name Description Type Constraints
ATC_CodeA Unique Alpha Numeric Anatomical Therapeutic Chemical Codestring-
ATC_Level_NameAnatomical Therapeutic Chemical Code Level Namestring-
New_DDDNew Rate of Defined Daily Dose. Various Sources are used to get the Best Overview of the Actual or Expected use of a Substance.numberlevel : Ratio
UnitDDD Unit of measurement (g=gram, gm = milligramstring-
Administration_RouteRoute of administration (O = oral, P = parenteral)string-

Data Preview

ATC CodeATC Level NameNew DDDUnitAdministration Route
A05AA04obeticholic acid10.0mgO
B03AB09ferric proteinsuccinylate80.0mgO Fe3+