Dysfunctional uterine bleeding: 1 tablet 3 times daily for 10 days. Bleeding is arrested usually within 1-3 days. A withdrawal bleeding resembling normal menstruation occurs within 2-4 days after discontinuing treatment.Premenstrual Syndrome: 2-3 tablets daily from the 19th to the 26th day of the cycle.Postponement of Menstruation: 1 tablet of Sysron-N three times daily, starting 3 days before the expected date of onset of menstruation. A normal period should occur 2-3 days after the patient has stopped taking tablets.Endometriosis : Long-term treatment is commenced on the 5th day of the cycle with 2 tablets of Sysron-N daily for the first few weeks. In the event of spotting, the dosage is increased to 4, and if necessary, 5 tablets daily. After bleeding has ceased, the initial dose is usually sufficient. Duration of treatment: 4-6 months continuously, or longer if necessary.