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 preparations used in ischemic heart diseases. See also C02 - Antihypertensives, C03 - Diuretics, C04 - Peripheral vasodilators, C07 - Beta blocking agents, C08 - Calcium channel blockers and C09 - Agents acting on the renin-angiotensin system.
Combinations with cardiac glycosides, see C01A.
Combinations with rauwolfia alkaloids, see C02AA.
Combinations with beta blocking agents, see C07.
Combinations with calcium channel blockers, see C08.

This group comprises vasodilators used in cardiac diseases, which cannot be classified in the preceding groups.