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Antiestrogens, also known as estrogen antagonists or estrogen blockers, are a class of drugs which prevent estrogens like estradiol from mediating their biological effects in the body. They act by blocking the estrogen receptor (ER) and/or inhibiting or suppressing estrogen production .
Anastrozole is in the aromatase-inhibiting family of medications. [7] It works by blocking the production of estrogens in the body, and hence has antiestrogenic effects. [7] Anastrozole was patented in 1987 and was approved for medical use in 1995. [8] [9] It is on the World Health Organization's List of Essential Medicines. [10]
This is a complete list of estrogens and formulations that are approved by the FDA Tooltip Food and Drug Administration and available in the United States. Estrogens are used as hormonal contraceptives , in hormone replacement therapy , and in the treatment of gynecological disorders .
Hormone and metabolic modulators modify the effects of hormones or accelerate or slow down enzyme reactions, for example anti-Estrogens are substances that block the effects of estrogen in the body (usually to prevent tumors) and are used by athletes to counter the side effects of steroids. [15]
Enclomifene is the (E)-stereoisomer of clomifene, while zuclomifene is the (Z)-stereoisomer. [ 4 ] [ 5 ] Whereas zuclomifene is more estrogenic , enclomifene is more antiestrogenic . [ 3 ] In accordance, unlike enclomifene, zuclomifene is antigonadotropic due to activation of the ER and reduces testosterone levels in men. [ 3 ]
Steroidal aromatase inhibitors are a class of drugs that are mostly used for treating breast cancer in postmenopausal women. High levels of estrogen in breast tissue increases the risk of developing breast cancer and the enzyme aromatase is considered to be a good therapeutic target when treating breast cancer due to it being involved in the final step of estrogen biosynthetic pathway and also ...
Selective estrogen receptor modulators (SERMs), also known as estrogen receptor agonists/antagonists (ERAAs), [1] [2] are a class of drugs that act on estrogen receptors (ERs). [3] Compared to pure ER agonists – antagonists (e.g., full agonists and silent antagonists ), SERMs are more tissue-specific, allowing them to selectively inhibit or ...
Estrogen deprivation therapy, also known as endocrine therapy, is a form of hormone therapy that is used in the treatment of breast cancer.Modalities include antiestrogens or estrogen blockers such as selective estrogen receptor modulators (SERMs) like tamoxifen, selective estrogen receptor degraders like fulvestrant, and aromatase inhibitors like anastrozole and ovariectomy.
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