The effect of cannabis on regular cannabis consumers’ ability to ride a bicycle
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To assess the effects of cannabis on the ability required to ride a bicycle, repetitive practical cycling tests and medical examinations were carried out before and after inhalative consumption of cannabis. A maximum of three joints with body weight-adapted THC content (300 μg THC per kg body weight) could be consumed by each test subject. Fourteen regular cannabis-consuming test subjects were studied (12 males, 2 females). In summary, only a few driving faults were observed even under the influence of very high THC concentrations. A defined THC concentration that leads to an inability to ride a bicycle cannot be presented. The test subjects showed only slight distinctive features that can be documented using a medical test routinely run for persons under suspicion of driving under the influence of alcohol or drugs.
KeywordsCannabis THC Bicycle Ability to ride Ability to drive Driving under the influence DUI Cannabis influence factor CIF
This study was sponsored by VEGaS e. V. (Verein zur Erforschung der Gefahren durch Drogen und andere Rauschmittel im Straßenverkehr).
Compliance with ethical standards
The experiments of this study comply with the current German laws. The study protocol was pre-approved by the ethics committee of the University Hospital Düsseldorf.
Conflict of interest
The authors declare that they have no competing interests.
- 1.Federal Highway Research Institute: DRUID project Final report 2012 http://www.druid-project.eu/Druid/EN/Dissemination/downloads_and_links/Final_Report.pdf?__blob=publicationFile&v=1
- 2.United Nations Office on Drugs and Crime: World Drug Report 2014 (United Nations publication, Sales No. E.14.XI.7)Google Scholar
- 8.Maatz KR (2006) Driving inability after drug use. Blutalkohol 43:451–465Google Scholar
- 9.Drasch G, von Meyer L, Roider G, Jaegerhuber A (2003) Absolute driving inability under the influence of cannabis. Proposal Threshold Limit 40:269–286Google Scholar
- 13.Schewe G, Schuster R, Englert L, Ludwig O, Stertmann WA (1980) Experimentelle Untersuchungen zur Frage der alkoholbedingten Fahruntüchtigkeit von Fahrrad- und Mofafahrern. Blutalkohol 17:298–328Google Scholar
- 15.Paul LD, Mußhoff F, Untergruppe “Richtlinienerstellung” des Arbeitskreises Qualitätssicherung (2009) Richtlinie der GTFCh zur Qualitätssicherung bei forensisch-toxikologischen Untersuchungen. https://www.gtfch.org/cms/images/stories/files/GTFCh_Richtlinie_For-Tox_Version%201.pdf (last access on 4th November 2015)
- 18.Robbe HWJ (1994) Influence of marijuana on driving. Institute for human psychopharmacology. University of Limburg, MaastrichtGoogle Scholar