Journal
MOVEMENT DISORDERS
Volume 38, Issue 7, Pages 1341-1346Publisher
WILEY
DOI: 10.1002/mds.29447
Keywords
Parkinson's disease; cannabis; cannabidiol; Delta 9-tetrahydrocannabinol; cognition
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This study presents cognitive safety data from a study on an orally administered high-dose cannabidiol (CBD; 100 mg) and low-dose Delta 9-tetrahydrocannabinol (THC; 3.3 mg) drug in patients with Parkinson's disease. The results indicate that the CBD/THC drug has a small detrimental effect on cognition following acute/short-term use, as evidenced by worse performance on the Animal Verbal Fluency test and higher incidence of adverse cognitive events compared to the placebo group.
Objective: Present cognitive safety data from study of an oral high-dose cannabidiol (CBD; 100 mg) and low-dose Delta 9-tetrahydocannabinol (THC; 3.3 mg) drug in PD. Methods: Randomized, double- blind, parallel-group, placebo-controlled study of a CBD/THC drug administered for 16.3 (SD: 4.2) days, with dosage escalating to twice per day. Neuropsychological tests were administered at baseline and 1-1 1/2 hours after final dose; scores were analyzed with longitudinal regression models (alpha = 0.05). Cognitive adverse events were collected. Results: When adjusted for age and education, the CBD/THC group (n = 29) performed worse than the placebo group (n = 29) on Animal Verbal Fluency. Adverse cognitive events were reported at least twice as often by the CBD/THC than the placebo group. Conclusion: Data suggest this CBD/THC drug has a small detrimental effect on cognition following acute/ short-term use in PD. (c) 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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