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As such, unlike MPA, medroxyprogesterone is not used clinically, though it has seen some use in veterinary medicine. [129] The oral dosage of MPA required to inhibit ovulation (i.e., the effective contraceptive dosage) is 10 mg/day, whereas 5 mg/day was not sufficient to inhibit ovulation in all women. [130]
The LD 50 has been found to range between 500 mg/kg in dogs and over 3000 mg/kg in rats. Chronic toxicity has been examined in animals, but nothing but the typical adverse effects of progestogens, and reduction of prostatic weight in rhesus monkeys, have been found. Accidental intake of the drug, including in children, is normally not dangerous.
Examples of progestogens used in hormone therapy for transgender women include cyproterone acetate, medroxyprogesterone acetate, and progesterone. Progestogens, such as medroxyprogesterone and lynestrenol, are used in transgender men to help suppress menses. Progestogens have also been used to delay puberty in transgender boys and girls.
Medroxyprogesterone, also known as 6α-methyl-17α-hydroxyprogesterone or as 6α-methyl-17α-hydroxypregn-4-en-3,20-dione, is a synthetic pregnane steroid and a derivative of progesterone. [ 2 ] [ 3 ] It is specifically a derivative of 17α-hydroxyprogesterone with a methyl group at the C6α position.
Estradiol cypionate/medroxyprogesterone acetate (EC/MPA), sold under the brand name Cyclofem among others, is a form of combined injectable birth control. [2] It contains estradiol cypionate (EC), an estrogen, and medroxyprogesterone acetate (MPA), a progestin. [2] It is recommended for short-term use and is given once a month by injection into ...
Major examples of progestins include the 17α-hydroxyprogesterone derivative medroxyprogesterone acetate and the 19-nortestosterone derivative norethisterone. The progestins are structural analogues of progesterone and have progestogenic activity similarly, but differ from progesterone in their pharmacological properties in various ways. [5]