Lorazepam

CAS No:
846-49-1 Category:
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Product Details:

  • CAS No: 846-49-1
  • AHFC code: 28:24.1
  • Synonyms: (+/-)-Lorazepam O-Chlorooxazepam O-Chloroxazepam
  • ATC Code: N05BA06
  • Chemical Formula: C29H38N4O10
  • Molecular Weight: 321.158
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB00186 (APRD00116)
  • SMILES: OC1N=C(C2=CC=CC=C2Cl)C2=C(NC1=O)C=CC(Cl)=C2
  • InChl: DIWRORZWFLOCLC-UHFFFAOYSA-N
  • PubChem: 3958
  • IUPAC: 7-chloro-5-(2-chlorophenyl)-3-hydroxy-2,3-dihydro-1H-1,4-benzodiazepin-2-one

Additional Details

Indication:
For the management of anxiety disorders, and for treatment of status epilepticus.
Pharmacodynamics:
Lorazepam, a benzodiazepine not transformed to active metabolites, is used to treat anxiety, status epilepticus, and for sedation induction and anterograde amnesia.
Mode of Action:
Lorazepam binds to an allosteric site on GABA-A receptors, which are pentameric ionotropic receptors in the CNS. Binding potentiates the effects of the inhibitory neurotransmitter GABA, which upon binding opens the chloride channel in the receptor, allowing chloride influx and causing hyperpolerization of the neuron.
Metabolism:
Hepatic
Toxicity:
Somnolence, confusion, and coma, LD50=3178mg/kg (orally in mice).
General Reference:
Kemper N, Poser W, Poser S: [Benzodiazepine dependence: addiction potential of the benzodiazepines is greater than previously assumed (authorês transl)] Dtsch Med Wochenschr. 1980 Dec 5;105(49):1707-12. Pubmed Lader M: Short-term versus long-term benzodiazepine therapy. Curr Med Res Opin. 1984;8 Suppl 4:120-6. Pubmed Maltais F, Laberge F, Laviolette M: A randomized, double-blind, placebo-controlled study of lorazepam as premedication for bronchoscopy. Chest. 1996 May;109(5):1195-8. Pubmed Heisterkamp DV, Cohen PJ: The effect of intravenous premedication with lorazepam (ativan), pentobarbitone or diazepam on recall. Br J Anaesth. 1975 Jan;47(1):79-81. Pubmed Milligan DW, Howard MR, Judd A: Premedication with lorazepam before bone marrow biopsy. J Clin Pathol. 1987 Jun;40(6):696-8. Pubmed
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