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.

All plain beta blocking agents are classified in this group.
Labetalol, and carvedilol are classified in C07AG - Alpha- and beta blocking agents.
Beta blocking agents in combination with ACE inhibitors are classified in C09BX - ACE inhibitors, other combinations.
Beta blocking agents in combination with ARBs are classified in C09DX - Angiotensin II receptor blockers (ARBs), other combinations.

All plain selective beta blocking agents are classified in this group.
The s-enantiomer and the racemate of atenolol are classified at separate 5th levels.