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ATC codes: G03AA05
Indication
Oral contraceptives ICD11 code: XM1713215584
INN
Ethinylestradiol + norethisterone
Medicine type
Chemical agent
List type
Core
Formulations
Oral > Solid: 35 µg + 1 mg
EML status history
First added in 1977 (TRS 615)
Changed in 1979 (TRS 641)
Changed in 1991 (TRS 825)
Sex
Female
Age
Adolescents and adults
Therapeutic equivalence
Medicines within the same pharmacological class can be used
Patent information
Patents have expired in most jurisdictions
Summary of evidence and Expert Committee recommendations
Ethinylestradiol 50 µg in contraceptive tablets also containing norethisterone was replaced by ethinylestradiol 35 µg, since the committee considered this (lower) strength to be safer.