ATC code C09
therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System: Agents acting on the renin-angiotensin system
ATC code C09 Agents acting on the renin–angiotensin system is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. Subgroup C09 is part of the anatomical group C Cardiovascular system.
Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QC09. National versions of the ATC classification may include additional codes not present in this list, which follows the WHO version.
Begin with the source’s own compact description: “ATC code C09” is therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System: Agents acting on the renin-angiotensin system. The dossier treats that line as a proposition to test through code, therapeutic and subgroup, not as a finished interpretation.
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The phrase “therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System: Agents acting on the renin-angiotensin system” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Dec 23, 2025. The linked authority identifier is Q433908. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “ATC code C09” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.