A prospective randomized study comparing the clinical effects of a norethisterone and a levonorgestrel containing low dose oestrogen oral contraceptive pills.
The two types of low dose oral contraceptives one containing levonorgestrel the other containing norethisterone have been compared in a randomized prospective study. We have found that cycle control was much poorer with the norethisterone pill and would therefore recommend that if the norethisterone-containing pill needs to be prescribed then either the 1 mg or the 'synphasic' preparation should be considered.
Anstee
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P
Family Planning Association of Victoria, Melbourne.
Kovacs
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GT
D000293:Adolescent; D000328:Adult; D001940:Breast / Q000187:drug effects; D003277:Contraceptives, Oral, Combined / Q000009:adverse effects*; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D006801:Humans; D016912:Levonorgestrel / Q000009:adverse effects*; D009640:Norethindrone / Q000009:adverse effects*; D011446:Prospective Studies; D014592:Uterine Hemorrhage / Q000139:chemically induced*; D015430:Weight Gain / Q000187:drug effects
D003277:Contraceptives, Oral, Combined; D004967:Estrogens; D016912:Levonorgestrel; D009640:Norethindrone