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 all products for treatment of varices, i.v. infusion induced thrombophlebitis etc.
Zinc bandages, see D09A - Medicated dressings.

Heparin in combination with e.g. dexpanthenol and allantoin is classified in C05BA53.
Heparin in combination with diclofenac for topical use is classified in M02AA15.
Heparinoids in combination with calcium dobesilate are classified in C05BX - Other sclerosing agents.