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.

Combinations with nicotinic acid and derivatives are allowed at each 5th level.