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Progesterone (P4), sold under the brand name Prometrium among others, is a medication and naturally occurring steroid hormone. [20] It is a progestogen and is used in combination with estrogens mainly in hormone therapy for menopausal symptoms and low sex hormone levels in women.
Progesterone was studied in the treatment of breast cancer in 1951 and 1952, but with relatively modest results. [158] [159] [160] Megestrol acetate was first studied in the treatment of breast cancer in 1967, and was one of the first progestins to be evaluated for the treatment of this disease. [6] [30] [161] A second study was conducted in 1974.
The side effects of cyproterone acetate (CPA), a steroidal antiandrogen and progestin, including its frequent and rare side effects, have been studied and characterized.It is generally well-tolerated and has a mild side-effect profile, regardless of dosage, when it used as a progestin or antiandrogen in combination with an estrogen such as ethinylestradiol or estradiol valerate in women.
Importantly, hormonal contraception is only associated with diagnosis of breast cancer and not an increased risk of mortality from breast cancer.” “All contraceptive methods have risks and ...
[38] [39] In addition, megestrol acetate has been found to be significantly inferior to aromatase inhibitors in the treatment of breast cancer, and in relation to this, progestogens have been moved down in the sequential therapy of the disease. [38] Megestrol acetate is the only Food and Drug Administration-approved progestogen for breast ...
MPA is a potent full agonist of the AR. Its activation of the AR may play an important and major role in its antigonadotropic effects and in its beneficial effects against breast cancer. [156] [173] [174] However, although MPA may produce androgenic side effects such as acne and hirsutism in some women,.
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