A new study suggests that using marijuana before sleep has minimal if any effect on a range of performance measures the next day, including simulated driving, cognitive and psychomotor function tasks, subjective effects and mood.
The report, which drew data from a larger study investigating the effects of THC and CBD on insomnia, looked at outcomes from 20 adults with physician-diagnosed insomnia who infrequently used marijuana.
“The results of this study indicate that a single oral dose of 10 mg THC (in combination with 200 mg CBD) does not notably impair ‘next day’ cognitive function or driving performance relative to placebo in adults with insomnia who infrequently use marijuana,” says the paper, from researchers at Macquarie University in Sydney, the University of Sydney, Royal Prince Alfred Hospital in Sydney, Gold Coast-based Griffith University and Johns Hopkins University.
“The use of cannabis by night as a sleep aid is highly prevalent and there are legitimate concerns that this may lead to impaired daytime (‘next day’) function, particularly on safety sensitive tasks such as driving,” the 11-author team wrote in the report published last week in the journal Psychopharmacology.
Results, however, showed “no differences in ‘next day’ performance in 27 out of 28 tests of cognitive and psychomotor function and simulated driving tests relative to placebo.”
Hellbound and Down 