Guidelines for ATC classification and DDD assignment - WHOCC

Plain antiflatulents, see A03AX - Other drugs for functional bowel
disorders.
The DDDs for antacids are based on treatment of hyperacidity and
dyspepsia, not ulcus. One exception, however, is antacids in
combination with antispasmodics in A02AG, where the DDDs are
based on treatment of ulcus.
For ordinary salt combinations in A02AD, fixed doses are used
instead of individual doses for every single preparation (10 tablets
= 10 UD; 50 ml mixture = 10 UD).
A02AA Magnesium compounds
Magnesium carbonate used for treatment of mineral deficiency is
classified here.
Combinations of different magnesium compounds are classified in
A02AA10 - combinations.
A02AB Aluminium compounds
Combinations of different aluminium compounds are classified in
A02AB10 - combinations.
A02AC Calcium compounds
Combinations of different calcium compounds are classified in
A02AC10 - combinations.
A02AD Combinations and complexes of aluminium, calcium and magnesium
compounds
Antacids with two or more of the substances in combination are
classified here.
Ordinary salt combinations are classified at the same 5th level
A02AD01 e.g. combinations of aluminium hydroxide, magnesium
carbonate gel and attapulgite, while the various complexes with a layer
structure are classified at separate 5th levels e.g. magaldrate and
almagate.
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