No effect of cannabinoid medicament on driving ability

The effects of the synthetic cannabinoid nabilone on driving ability was investigated in 6 patients with multiple sclerosis and spasticity. In a crossover design they received either 2 mg nabilone/day or placebo. No indication was found of a deterioration of any of the five investigated neuropsychological functions (reaction time, working memory, divided attention, psychomotor speed and mental flexibility) during the 4-week treatment period with nabilone. Nabilone shows similar effects as THC, 1 mg of nabilone comparing to about 10 mg THC.

(Source: Kurzthaler I, et al. Hum Psychopharmacol 2005 Apr 18; Electronic publication ahead of print)