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Systematic (IUPAC) name
Clinical data
Pregnancy cat.
  • D
Legal status
Routes Oral
CAS number 42863-81-0
ATC code None
PubChem CID 68672
ChemSpider 61926
Chemical data
Formula C14H9Cl2N3O2 
Mol. mass 322.146 g/mol

Lopirazepam (INN)[1] is a short-acting benzodiazepine analog of the pyridodiazepine type (specifically, the pyridodiazepine analog of lorazepam) with anxiolytic and hypnotic properties.[2][3] It has never been marketed.[4]

See also[edit]


  1. ^ US Patent 4008223
  2. ^ Saletu M, Saletu B, Grünberger J, Mader R, Karobath M (1983). "Clinical symptomatology and computer analyzed EEG before, during and after anxiolytic therapy of alcohol withdrawal patients". Neuropsychobiology 9 (2–3): 119–34. doi:10.1159/000117949. PMID 6353268. 
  3. ^ Fabian A, Röhmel R, Kubicki S (September 1984). "[Changes in the length of sleep cycles during administration of flurazepam and lopirazepam]". EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb (in German) 15 (3): 151–8. PMID 6435999. 
  4. ^ David J. Triggle; C. R. Ganellin; F. MacDonald (1996). Dictionary of Pharmacological Agents 2. Boca Raton: Chapman & Hall/CRC. p. 1232. ISBN 0-412-46630-9.  Retrieved on December 31, 2008 through Google Book Search.