| abstract |
(57) [Summary] [PROBLEMS] To obtain a substance capable of inhibiting the induction of breast cancer. SOLUTION: The induction of breast cancer is prevented by administering a breast cancer inhibitor containing melatonin or a melatonin analog to a human woman every day for a certain period of time. It may be administered in combination with a progestogen and / or an estrogen. The daily dose of melatonin for women weighing 70 kg is 2 mg to 1000 mg, the dose of progestogen is 7.5 μg to 2500 μg, and the dose of estrogen is 2 μg to 100 μg. It is administered orally, by intravenous injection or subcutaneous implantation in a physiologically suitable carrier. |