Guidelines for ATC classification and DDD assignment - WHOCC

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The DDDs are based on the treatment of mild-moderate
hypertension.
The DDDs for oral and parenteral formulations are equal, even if
the parenteral preparations are used for the initial treatment of
arrhythmias. Exception: practolol.
C07AA Beta blocking agents, non-selective
All plain non-selective beta blocking agents are classified in this group.
Combined packages containing sotalol tablets and aspirin tablets are
classified in C07AA57.
C07AB Beta blocking agents, selective
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.
Different DDDs have been assigned for the two stereoisomeric
forms of atenolol due to different potency.
C07AG Alpha and beta blocking agents
C07B BETA BLOCKING AGENTS AND THIAZIDES
This group comprises combinations of beta blocking agents and
thiazides. Different thiazides may occur at each 5th level.
Combinations of beta blocking agents, thiazides and other agents are
classified at separate 5th levels using the 50-series.
See comments to C02L concerning the principles for assignment of
DDDs for the combined preparations.
C07BA Beta blocking agents, non-selective, and thiazides
C07BB Beta blocking agents, selective, and thiazides