The effects of lorazepam on skin conductance responses to aversive stimuli in healthy subjects

Research output: Contribution to journalResearch articleContributedpeer-review


  • Martin Siepmann - , Institute of Clinical Pharmacology (Author)
  • Benjamin Heine - , Medical Faculty Carl Gustav Carus (Author)
  • Andreas Kluge - , Medical Faculty Carl Gustav Carus (Author)
  • Tjalf Ziemssen - , Department of Neurology (Author)
  • Michael Mück-Weymann - , TUD Dresden University of Technology (Author)
  • Wilhelm Kirch - , Medical Faculty Carl Gustav Carus (Author)


Background: Autonomic responses to aversive stimuli are widely used to model anxiolytic drug effects in healthy humans. Benzodiazepine anxiolytics dose dependently attenuate autonomic responses to aversive stimuli by their anxiolytic as well as sedative action. The present study aimed to examine the effects of non-sedative doses of lorazepam on skin cutaneous responses to aversive stimuli and subjective mood. Methods: A randomized, double blind, cross over study of 12 healthy male volunteers aged 24 years (23-32; median; range) was carried out. Subjects received single oral doses of 0.5 and 1.0 mg lorazepam as well as placebo on three different occasions with at least 5 days in-between. Skin conductance responses (SCRs) to unpleasant pictures and noises, pupillary unrest index as well as subjective levels of anxiety were measured repeatedly before and after drug administration. Results: SCRs were found significantly lower 2 hours following ingestion of 0.5 mg lorazepam as well as 1, 2 and 3 hours after 1.0 mg lorazepam were given as compared to baseline conditions. By contrast, administration of placebo did not influence SCRs to a significant extent. Both doses of lorazepam did not change pupillary unrest index nor subjective mood. Conclusions: Lorazepam may attenuate SCRs to aversive stimuli without affecting vigilance nor subjective mood. Attenuation of autonomic responses to aversive stimuli may not be specific for an anxiolytic effect.


Original languageEnglish
Pages (from-to)160-164
Number of pages5
JournalClinical Autonomic Research
Issue number3
Publication statusPublished - Jun 2007

External IDs

PubMed 17390103



  • Anxiolytic, Healthy subjects, Lorazepam, Sedative, Skin-conductance responses, Subjective mood