Clinical data
ATC code None
Legal status
Legal status
CAS Number 70030-11-4
PubChem (CID) 125820
ChemSpider 111897
Chemical and physical data
Formula C15H10BrClN2O2
Molar mass 365.609 g/mol
3D model (Jmol) Interactive image

3-Hydroxyphenazepam is a benzodiazepine with hypnotic, sedative, anxiolytic, and anticonvulsant properties.[1] It is an active metabolite of phenazepam,[1][2] as well as the active metabolite of the benzodiazepine prodrug cinazepam.[3] Relative to phenazepam, 3-hydroxyphenazepam has diminished myorelaxant properties, but is about equivalent in most other regards.[1] Like other benzodiazepines, 3-hydroxyphenazepam behaves as a positive allosteric modulator of the benzodiazepine site of the GABAA receptor with an EC50 value of 10.3 nM.[4][5][6] It has been sold online as a designer drug.[7][8][9]

See also


  1. 1 2 3 Artur Viktorovich Valʹdman (31 May 1986). Drug dependence and emotional behavior: neurophysiological and neurochemical approaches. Consultants Bureau. ISBN 978-0-306-10984-3.
  2. Lukasz Komsta; Monika Waksmundzka-Hajnos; Joseph Sherma (20 December 2013). Thin Layer Chromatography in Drug Analysis. CRC Press. pp. 299–. ISBN 978-1-4665-0715-9.
  3. Schukin SI, Zinkovsky VG, Zhuk OV (2011). "Elimination kinetics of the novel prodrug cinazepam possessing psychotropic activity in mice" (PDF). Pharmacol Rep. 63 (5): 1093–100. doi:10.1016/s1734-1140(11)70628-4. PMID 22180351.
  4. "Phenazepam Pre-Review Report" (PDF). World Health Organisation (WHO). November 2015.
  5. Kopanitsa, M. V.; Zbarska, S. M.; Boychuk, Ya. A.; Krishtal, O. A. (2000). "Modulation of GABA-activated currents by phenazepam and its metabolites in isolated rat purkinje neurons". Neurophysiology. 32 (3): 192–192. doi:10.1007/BF02506568. ISSN 0090-2977.
  6. Golovenko, N. Ya; Larionov, V. B. (2014). "Pharmacodynamical and Neuroreceptor Analysis of the Permeability of the Blood-Brain Barrier for Derivatives of 1,4-Benzodiazepine". Neurophysiology. 46 (3): 199–205. doi:10.1007/s11062-014-9429-2. ISSN 0090-2977.
  7. "3-hydroxyphenazepam". New Synthetic Drugs Database.
  8. Madeleine Pettersson Bergstrand; Anders Helander; Therese Hansson; Olof Beck (2016). "Detectability of designer benzodiazepines in CEDIA, EMIT II Plus, HEIA, and KIMS II immunochemical screening assays". Drug Testing and Analysis. doi:10.1002/dta.2003. PMID 27366870.
  9. Moosmann, Bjoern; Bisel, Philippe; Franz, Florian; Huppertz, Laura M.; Auwärter, Volker (2016). "Characterization and in vitro phase I microsomal metabolism of designer benzodiazepines – an update comprising adinazolam, cloniprazepam, fonazepam, 3-hydroxyphenazepam, metizolam, and nitrazolam". Journal of Mass Spectrometry. doi:10.1002/jms.3840. ISSN 1096-9888. PMID 27535017 via Wiley Online Library.
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