title: The effect of cannabis on regular cannabis consumers' ability to ride a bicycle.
abstract: 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.
authors.affiliation: Institute of Legal Medicine, University Hospital Düsseldorf, Düsseldorf, Germany. benno.hartung@med.uni-duesseldorf.de.
authors.forename: Benno
authors.initials: B
authors.lastname: Hartung
authors.affiliation: Institute of Mathematics, Heinrich-Heine-University, Düsseldorf, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Schwender
authors.affiliation: Augenzentrum Friedrichstadt, Düsseldorf, Germany.
authors.forename: Eckhard H
authors.initials: EH
authors.lastname: Roth
authors.affiliation: Department of Psychiatry, Heinrich-Heine-University, Düsseldorf, Germany.
authors.forename: Florence
authors.initials: F
authors.lastname: Hellen
authors.affiliation: Institute of Legal Medicine, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Nona
authors.initials: N
authors.lastname: Mindiashvili
authors.affiliation: Institute of Legal Medicine, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Annette
authors.initials: A
authors.lastname: Rickert
authors.affiliation: Institute of Legal Medicine, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Ritz-Timme
authors.affiliation: Department of Anaesthesiology, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Almut
authors.initials: A
authors.lastname: Grieser
authors.affiliation: Institute of Legal Medicine, Paris-Lodron-University, Salzburg, Austria.
authors.forename: Fabio
authors.initials: F
authors.lastname: Monticelli
authors.affiliation: Institute of Legal Medicine, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Daldrup
mesh_terms: D000328:Adult; D001642:Bicycling; D002188:Cannabis; D000066448:Driving Under the Influence; D013759:Dronabinol / Q000031:analogs & derivatives / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking; D055815:Young Adult
chemical_list: D013759:Dronabinol; C025351:delta(9)-tetrahydrocannabinolic acid
keywords: Ability to drive; Ability to ride; Bicycle; CIF; Cannabis; Cannabis influence factor; DUI; Driving under the influence; THC