Used primarily in the treatment of advanced breast and endometrial cancers, helping to slow tumor growth by interfering with hormone-sensitive cancer cell proliferation. Also prescribed to manage appetite loss and weight reduction in patients with cancer or acquired immunodeficiency syndrome (AIDS), promoting weight gain and improving overall nutritional status. Its strong progestogenic activity makes it effective in controlling endometriosis and certain menstrual disorders. Commonly administered orally, it is valued for its long half-life and consistent absorption.