Treatment of secondary amenorrhea Single daily dose of 400 mg at bedtime for 10 days.
Prevention of endometrial hyperplasia Postmenopausal woman w/ a uterus who is receiving daily conjugated estrogen tab Single daily dose of 200 mg at bedtime for 12 days sequentially per 28-day cycle.
Premenstrual syndrome, benign mastopathies, menstrual irregularities, pre-menopause Initially 200-300 mg daily, 10 days/cycle, usually from 14th day to until onset of menstruation.
Threatened abortion or prevention of LPD-related recurrent spontaneous abortions 200-400 mg daily, spread over 2 doses, to be taken up until gestation wk 12.
Threatened preterm delivery 400 mg every 6-8 hr, depending on the clinical results obtained during acute phase, followed by a maintenance dose (eg, 3 times 200 mg daily) to be taken up until gestation wk 36.