The Anatomical Therapeutic Chemical (ATC) classification system, divides active substances into different groups according to the organ or system on which they act and their therapeutic, pharmacological and chemical properties. Drugs are classified in groups at five different levels; Drugs are divided into fourteen main groups (1st level), with pharmacological/therapeutic subgroups (2nd level). The 3rd and 4th levels are chemical/pharmacological/therapeutic subgroups and the 5th level is the chemical substance. The Anatomical Therapeutic Chemical (ATC) classification system and the Defined Daily Dose (DDD) is a tool for exchanging and comparing data on drug use at international, national or local levels.

Prefix

atc

Alternative Prefixes

ATC_code ATTC

Links

Homepage

Contact

WHO Collaborating Centre for Drug Statistics Methodology

Pattern for Local Unique Identifiers

Local identifiers in Anatomical Therapeutic Chemical Classification System should match this regular expression:
^[A-Z](\d+([A-Z]{1,2}(\d+)?)?)?$

Example Local Unique Identifier

A10BA02   Resolve

Pattern for CURIES

Compact URIs (CURIEs) constructed from Anatomical Therapeutic Chemical Classification System should match this regular expression:
^atc:[A-Z](\d+([A-Z]{1,2}(\d+)?)?)?$

Example CURIE

atc:A10BA02

Publications

• 1980 [New classification of drugs. The Medical list and the Drug catalogue are introduced in Anatomical--Therapeutic--Chemical classification code (ACT-code) in 1981].
• 2000 Different versions of the anatomical therapeutic chemical classification system and the defined daily dose--are drug utilisation data comparable?

The metaregistry provides mappings between the Bioregistry and other registries. There are 10 mappings to external registries for atc with 5 unique external prefixes.

Providers are various services that resolve CURIEs to URLs. The example CURIE atc:A10BA02 is used to demonstrate the provides available for atc. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.