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Price of Levonorgestrel
* price without discount in nearest pharmacy. Price may vary.
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Levonorgestrel volume of distribution
* 260 L (Healthy Female Volunteers under Fasting Conditions)
* 1.8 L/kg
What is Levonorgestrel
A synthetic progestational hormone with actions similar to those of progesterone and about twice as potent as its racemic or (+-)-isomer (norgestrel). It is used for contraception, control of menstrual disorders, and treatment of endometriosis. It is usually supplied in a racemic mixture (Norgestrel, 6533-00-2). Only the levonorgestrel isomer is active. Levonorgestrel is marketed mostly as a combination oral contraceptive under several brand names such as Alesse, Triphasil, and Min-Ovral.
Levonorgestrel mechanism of action
Binds to the progesterone and estrogen receptors. Target cells include the female reproductive tract, the mammary gland, the hypothalamus, and the pituitary. Once bound to the receptor, progestins like levonorgestrel will slow the frequency of release of gonadotropin releasing hormone (GnRH) from the hypothalamus and blunt the pre-ovulatory LH (luteinizing hormone) surge.
Dosage forms of Levonorgestrel
(8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy- 1,2,6,7,8,9,10,11,12,13,14,15,16, 17- tetradecahydrocyclopenta(a) phenanthren-3-one
Teva Women’s Health, Inc.
Humans and other mammals
Indication of Levonorgestrel
For the treatment of menopausal and postmenopausal disorders and alone or in combination with other hormones as an oral contraceptive.
Toxicity of Levonorgestrel
LD50 5000 mg/kg (orally in rats)
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