Chlormadinone acetate

Chlormadinone acetate (INN, USAN, BAN, JAN) (sold under brand names including Clordion, Gestafortin, Lormin, Non-Ovlon, Normenon, Verton, and many others), sometimes abbreviated as CMA, and also known as 17α-acetoxy-6-chloro-6-dehydroprogesterone, is a steroidal progestin with additional antiandrogen and antigonadotropic (and by extension antiestrogenic) effects. CMA has been used in the treatment of vaginal bleeding, oligomenorrhea, polymenorrhea, hypermenorrhea, secondary amenorrhea, and endometriosis. It has also been used clinically as a hormonal contraceptive, and in part due to its capacity to lower estrogen levels, but also for improved effectiveness in contraception, chlormadinone has frequently been combined with ethinyl estradiol for this purpose.