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[1] [2] EE is an estrogen, while norethisterone acetate (NETA) is a progestin. [1] It is taken by mouth. [1] Some preparations of EE/NETA used in birth control additionally contain an iron supplement in the form of ferrous fumarate. [3]
All contain an estrogen, ethinylestradiol or mestranol, [1] [2] in varying amounts, and one of a number of different progestogens. (Regarding the estrogen, the inactive 3-methyl ether of ethinylestradiol, which must be metabolized by the liver into the active ethinylestradiol; 50 μg of mestranol is equivalent to only 35 μg of ethinylestradiol and should not be used when high-dose [50 μg ...
Norethisterone and ethinylestradiol levels over 24 hours after a single oral dose of 10 mg NETA in postmenopausal women. [25] NETA metabolizes into ethinylestradiol at a rate of 0.20 to 0.33% across a dose range of 10 to 40 mg. [26] [27] Peak levels of ethinylestradiol with a 10, 20, or 40 mg dose of NETA were 58, 178, and 231 pg/mL, respectively.
[49] [50] A study of 194 women treated with 5 to 15 mg/day norethisterone acetate for a median duration of 13 months of therapy to suppress symptoms of endometriosis observed no side effects in 55.2% of patients, weight gain in 16.1%, acne in 9.9%, mood lability in 8.9%, hot flashes in 8.3%, and voice deepening in two women (1.0%).
Estradiol and norethisterone acetate (Activella, Amabelz) – 1 mg / 0.5 mg; 0.5 mg / 0.1 mg Ethinylestradiol and norethisterone acetate (FemHRT) – 25 μg / 0.5 mg Estradiol/progesterone (TX-001HR), a combination of estradiol and progesterone in oil-filled capsules, is currently pending approval.
With a single intramuscular injection of 200 mg NETE in premenopausal women, the mean maximum concentration of ethinylestradiol was 32% of that of a combined oral contraceptive containing 30 μg ethinylestradiol, the maximum equivalent oral dose of ethinylestradiol observed in the first few days of exposure was 20.3 μg/day, and the mean ...
In 1952, Rock induced a three-month anovulatory "pseudopregnancy" state in eighty of his infertility patients with continuous gradually increasing oral doses of an estrogen (5 to 30 mg/day diethylstilbestrol) and progesterone (50 to 300 mg/day), and within the following four months 15% of the women became pregnant.
[6] [18] [17] One review lists the ovulation-inhibiting dose of norgestrel as 100 μg/day. [19] The endometrial transformation dose of norgestrel is listed as 12 mg per cycle and the menstrual delay test dose of norgestrel is listed as 0.5 to 2 mg/day. [19] [20]
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