Estazolam

CAS No:
29975-16-4 Category:
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Product Details:

  • CAS No: 29975-16-4
  • AHFC code:
  • Synonyms:
  • ATC Code: N05CD04
  • Chemical Formula: C14H19N5O4
  • Molecular Weight: 294.738
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB01215 (APRD00955)
  • SMILES: ClC1=CC2=C(C=C1)N1C=NN=C1CN=C2C1=CC=CC=C1
  • InChl: CDCHDCWJMGXXRH-UHFFFAOYSA-N
  • PubChem: 3261
  • IUPAC: 12-chloro-9-phenyl-2,4,5,8-tetraazatricyclo[8.4.0.0^{2,6}]tetradeca-1(10),3,5,8,11,13-hexaene

Additional Details

Indication:
For the short-term management of insomnia characterized by difficulty in falling asleep, frequent nocturnal awakenings, and/or early morning awakenings.
Pharmacodynamics:
Estazolam, a triazolobenzodiazepine derivative, is an oral hypnotic agent with anticonvulsant, hypnotic, and muscle relaxant properties. It has been shown in some cases to be more potent than diazepam or nitrazepam.
Mode of Action:
Benzodiazepines bind nonspecifically to benzodiazepine receptors, which affects affects muscle relaxation, anticonvulsant activity, motor coordination, and memory. As benzodiazepine receptors are thought to be coupled to gamma-aminobutyric acid-A (GABAA) receptors, this enhances the effects GABA by increasing GABA affinity for the GABA receptor. Binding of the inhibitory neurotransmitter GABA to the site opens the chloride channel, resulting in a hyperpolarized cell membrane that prevents further excitation of the cell.
Metabolism:
Extensively metabolized in the liver. In vitro studies with human liver microsomes indicate that the biotransformation of estazolam to the major circulating metabolite 4-hydroxy-estazolam is mediated by cytochrome P450 3A (CYP3A).
Toxicity:
Symptoms of overdose include confusion, depressed breathing, drowsiness and eventually coma, lack of coordination, and slurred speech.
General Reference:
Watanabe S, Ohta H, Sakurai Y, Takao K, Ueki S: [Electroencephalographic effects of 450191-S and its metabolites in rabbits with chronic electrode implants] Nippon Yakurigaku Zasshi. 1986 Jul;88(1):19-32. Pubmed Oishi R, Nishibori M, Itoh Y, Saeki K: Diazepam-induced decrease in histamine turnover in mouse brain. Eur J Pharmacol. 1986 May 27;124(3):337-42. Pubmed Usami N, Yamamoto T, Shintani S, Ishikura S, Higaki Y, Katagiri Y, Hara A: Substrate specificity of human 3(20)alpha-hydroxysteroid dehydrogenase for neurosteroids and its inhibition by benzodiazepines. Biol Pharm Bull. 2002 Apr;25(4):441-5. Pubmed
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