Guidelines for ATC classification and DDD assignment - WHOCC

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In A11AA04 only trace elements are allowed in addition to
multivitamins.
Combinations with other substances, e.g. caffeine, are classified in
A11AB.
Cholin, biotin, inositol and para-amino benzoic acid are regarded as
vitamins and are allowed in preparations classified in A11AA.
A11AA01 multivitamins and iron
Preparations containing multivitamins and sub-therapeutic doses of iron
are classified in this group.
Sub-therapeutic doses of iron are defined as 5-30 mg of Fe 2+ per defined
daily dose, with corresponding limits for the various Fe 3+ salts, if the
main indication is not "iron deficiency". Preparations containing more
than 30 mg Fe 2+ (or corresponding doses of Fe 3+ ) are classified as iron
preparations (B03A) regardless of therapeutic use.
See also A11AA.
A11AA02 multivitamins and calcium
Preparations containing multivitamins and sub-therapeutic doses of
calcium are classified in this group, e.g. a calcium content of up to 500
mg calcium carbonate per tablet have been allowed.
See also A11AA.
Calcium preparations, see A12A.
A11AA03 multivitamins and other minerals, incl. combinations
Preparations containing multivitamins and sub-therapeutic doses of one
or more mineral are classified in this group. Definitions of subtherapeutic
doses of iron and calcium, see A11AA01 and A11AA02.
See also A11AA.
Mineral supplements, see A12.