Residual effects and skills related to driving after a single oral administration of diazepam, medazepam or lorazepam

British Journal of Clinical Pharmacology
K SeppäläM Linnoila


Psychomotor skills and visual functions related to driving were measured double-blind cross-over in ten healthy volunteers before, and 1,3,5 and 7 h after a single oral administration of diazepam (10mg), medazepam (15 mg) or lorazepam (2.5 mg). The late effects of lorazepam were tested in seven other subjects 12 and 24 h after the administration. Lorazepam impaired almost all the measured skills more (P less than 0.05 to 0.001) than diazepam, medizepam or the placebo. The lorazepam impairment of reactive skills and flicker fusion discrimination remained statistically significant (P less than 0.05) for as long as 12 h. Medazepam impaired only reactive skills and flicker fusion, the latter remaining impaired (P less than 0.05) for as long a 5 h after the administration. The magnitude and duration of the effects of diazepam were intermediate between those of lorazepam and medazepam. Diazepam impaired perceptual speed and reactive and co-ordinative skills as well as flicker fusion discrimination and visual parameters related to driving. Slight impairments in performance were measurable for up to 5 h after administration but at 7 h the results resembled those measured after the placebo. The lack of alterations in adaptation to dark...Continue Reading


Jan 1, 1976·Acta Anaesthesiologica Scandinavica·K Korttila, M Linnoila
Jul 23, 1975·Psychopharmacologia·A PenttiläJ Lönnqvist
Jan 1, 1973·The Journal of Pharmacy and Pharmacology·R W BellP Turner
Dec 21, 1974·British Medical Journal·D I Jeffery, M F Whitfield
Jan 1, 1973·Current Medical Research and Opinion·A B KhoranaA S Nanivadekar
Jan 1, 1973·Current Medical Research and Opinion·D EavesR P Swinson
Jan 1, 1973·Current Medical Research and Opinion·J T Silverstone
Apr 1, 1974·Clinical Pharmacology and Therapeutics·M Linnoila, S Häkkinen
Aug 23, 1974·European Journal of Clinical Pharmacology·M LinnoilaM Maki
Dec 1, 1974·British Journal of Anaesthesia·K Korttila, M Linnoila
Mar 1, 1974·Annals of Internal Medicine·L E Hollister
Jan 16, 1971·British Medical Journal·R J Kerry, C M McDermott
May 1, 1971·Clinical Pharmacology and Therapeutics·H W ElliottW H Comer
Dec 1, 1971·The British Journal of Psychiatry : the Journal of Mental Science·I Haider
Oct 1, 1971·British Journal of Industrial Medicine·H Hänninen
Feb 1, 1971·British Journal of Anaesthesia·I G Grove-White, G R Kelman
Dec 1, 1974·British Journal of Clinical Pharmacology·T Silverstone


Oct 1, 1978·British Journal of Clinical Pharmacology·C H Clarke, A N Nicholson
Jan 1, 1979·British Journal of Clinical Pharmacology·A N Nicholson
May 11, 1985·British Medical Journal·J Catalan, D Gath
Apr 1, 1996·Environmental Health Perspectives·A Wetherell
Sep 29, 2007·Anesthesia Progress·Mark DonaldsonBrian Chanpong
Mar 7, 2003·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·David R SinclairAlison Smiley
Jan 1, 1983·Progress in Neuro-psychopharmacology & Biological Psychiatry·S G McKenzie
Jan 1, 1987·European Journal of Clinical Pharmacology·A PatatM Hucher
Jan 1, 1988·European Journal of Clinical Pharmacology·A PatatJ Granier
Jan 1, 1992·European Journal of Clinical Pharmacology·A Irving, W Jones
Jan 1, 1990·Acta Anaesthesiologica Scandinavica·K KorttilaL J Fischer
Jan 1, 1978·Acta Anaesthesiologica Scandinavica·K Korttila, T Seppälä
Jan 1, 1979·British Journal of Clinical Pharmacology·A N Nicholson
May 7, 2011·Drug and Alcohol Review·Stefanie Y Leung
May 1, 1983·British Journal of Clinical Pharmacology·K ArankoT Seppälä
Dec 1, 1982·Acta Anaesthesiologica Scandinavica·J Kanto, U Klotz
Aug 1, 1980·British Journal of Clinical Pharmacology·I Hindmarch, A C Gudgeon
Sep 1, 1980·British Journal of Clinical Pharmacology·I Hindmarch
Aug 1, 1986·Anaesthesia·V Narang, J R Laycock
Jul 28, 2004·Traffic Injury Prevention·E J D Ogden, H Moskowitz
Mar 1, 1988·The British Journal of Psychiatry : the Journal of Mental Science·J CatalanJ Ennis
Jun 18, 2019·Journal of Clinical Psychopharmacology·Richard I Shader
Feb 18, 1999·The American Journal of Gastroenterology·M OkamotoM A Fujino
Jun 1, 1984·The British Journal of Psychiatry : the Journal of Mental Science·J CatalanP Martin
May 1, 1979·Acta Pharmacologica Et Toxicologica·R Liljequist, M J Mattila
Jan 1, 1983·Acta Pharmacologica Et Toxicologica·T Seppälä, R Visakorpi
Jul 1, 1980·Acta Pharmacologica Et Toxicologica·M LinnoilaP Routledge
May 1, 1982·Acta Pharmacologica Et Toxicologica·E S PalvaT Seppälä
Jul 1, 1985·British Journal of Clinical Pharmacology·A Patat, P Foulhoux
Feb 1, 1978·Journal of Clinical Pharmacology·S NakanoE Osato
Apr 1, 1990·Journal of Pharmacokinetics and Biopharmaceutics·S K GuptaD G Heatherly
Jan 1, 1981·British Journal of Clinical Pharmacology·A N Nicholson
Jun 13, 1981·The Medical Journal of Australia·A A Landauer

Related Concepts

Automobile Driving
Dark Adaptation
Flicker Fusion
Medazepam AWD
Motor Skills
Reaction Time
Anti-Anxiety Effect

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