Guidelines for ATC classification and DDD assignment - WHOCC

The DDDs are based on the treatment of climacterical ailments.
G03EA Androgens and estrogens
G03EB Androgen, progestogen and estrogen in combination
G03EK Androgens and female sex hormones in combination with other drugs
This group comprises preparations, which in addition to the hormones
also contain other drugs.
G03F PROGESTOGENS AND ESTROGENS IN COMBINATION
This group comprises combined preparations used in the treatment of
menopausal symptoms, menstrual irregularities etc.
Hormonal contraceptives, see G03A.
The DDDs for combined preparations of estrogens and
progestogens are based on use in postmenopausal substitution
therapy in cycles of 28 days. Thus, the DDD is 0.75 and 1 UD for
21 and 28 tablets cycle packages, respectively.
G03FA Progestogens and estrogens, fixed combinations
This group comprises preparations, which contain combinations of
progestogens and estrogens. Sequential preparations are classified in
G03FB. Combination packages with separate tablets containing
progestogens and estrogens intended to be taken together are also
classified in this group. The preparations are classified at 5th levels
according to the progestogen. At each 5th level various estrogens may
occur.
Combinations of progestogens and estrogens used as contraceptives are
classified in G03A.
G03FB Progestogens and estrogens, sequential preparations
This group comprises preparations with varying contents of
progestogens and estrogens adjusted to the normal hormonal cycle. A
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