NORETHISTERONE

Adult (female): by mouth, 10–15 mg daily for 4–6 months or longer, starting on day 5 of cycle (increased to 20–25 mg daily if spotting occurs and reduced once bleeding has stopped)

Adult (female): by mouth, 5 mg every 8 hours for 10 days to stop bleeding; followed by 5 mg every 12 hours from day 19 to day 26 of cycle to prevent bleeding

Adult (female): by mouth, 5 mg every 8 hours from day 5 to day 24 for 3–4 cycles

Adult (female): by mouth, 5 mg every 8 hours starting 3 days before expected onset of menstruation

Adult (female): 5 mg every 8–12 hours from day 19–26 for several cycles