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Metallibure
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Metallibure

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Metallibure
Metallibure.svg
Clinical data
Trade names Aimax, Suisynchron, Turisynchron
Other names Methallibure; Methallibur; ICI-33828; AY-61122; NSC-69536
Drug class Antigonadotropin
Identifiers
  • 1-but-3-en-2-yl-3-(methylcarbamothioylamino)thiourea
CAS Number
PubChem CID
ChemSpider
UNII
ECHA InfoCard 100.011.952
Chemical and physical data
Formula C7H14N4S2
Molar mass 218.34 g·mol−1
3D model (JSmol)
  • CC(C=C)NC(=S)NNC(=S)NC
  • InChI=1S/C7H14N4S2/c1-4-5(2)9-7(13)11-10-6(12)8-3/h4-5H,1H2,2-3H3,(H2,8,10,12)(H2,9,11,13)
  • Key:CGFFKDRVHZIQHL-UHFFFAOYSA-N

Metallibure (INN) (brand names Aimax, Suisynchron, Turisynchron; former developmental code names ICI-33828, AY-61122, NSC-69536), also known as methallibure (USAN, BAN) or methallibur (German), is a medication which was introduced in 1973 and has been used in veterinary medicine to synchronize estrus. It was withdrawn in the United States and Europe due to teratogenicity and has been replaced with altrenogest (Regumate, Matrix), a progestin.

The precise mechanism of action of metallibure is unknown. It has been described as a "nonsteroidal antigonadotropin" and it appears to act directly on the pituitary gland and/or hypothalamus to suppress gonadotropin secretion. However, metallibure has also been reported to be an antiprogestogen and to act specifically via inhibition of the biosynthesis or secretion of progesterone.

Metallibure has similar endocrinological effects in women. It is associated with several unpleasant side effects including appetite loss, nausea, occasional vomiting, lethargy, and drowsiness. Animal toxicity studies revealed that the medication induced the development of cataracts, and this resulted in the termination of its clinical development.

See also




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