This group comprises substances used for the treatment of cardiovascular conditions.
Drugs used for the treatment of hypertension are classified in C02 - Antihypertensives, C03 - Diuretics, C07 - Beta blocking agents, C08 - Calcium channel blockers, and C09 - Agents acting on the renin-angiotensin system. For the classification of combination products of antihypertensives from different ATC groups, the following ranking should be used, from higher to lower precedence: C09, C07, C08, and C03.

This group comprises plain and combined preparations used in the treatment of cerebrovascular or peripheral circulatory disorders.
Combinations with Antihypertensives, see C02 - Antihypertensives.
Combinations with vasodilators used in cardiac diseases, see C01DA.

Includes low strength preparations (e.g. nicotinic acid tablets 50 mg). Nicotinic acid preparations in high strength (e.g. nicotinic acid tablets 500 mg) is used as a cholesterol reducer and is classified in C10AD.