By Paul Armentano, NORML Deputy Director
The administration of cannabidiol (CBD), a nonpsychotropic cannabinoid, is associated with improved quality of life in patients with Parkinson's disease, according clinical trial data published online ahead of print in the Journal of Psychopharmacology.
Investigators at the University of São Paulo in Brazil assessed the efficacy of CBD versus placebo in 21 subjects with Parkinson's. Authors reported that the administration of 300 mg doses of CBD per day was associated with "significantly different mean total scores" in subjects' well-being and quality of life compared to placebo.
Separate assessments of CBD versus placebo reported that the cannabinoid did not appear to mitigate general symptoms of the disease, nor was it shown to be neuroprotective.
"This study points to a possible effect of CBD in improving measures related to the quality of life of PD patients without psychiatric comorbidities," investigators concluded. They added, "We found no statistically significant differences concerning the motor symptoms of PD; however, studies involving larger samples and with systematic assessment of specific symptoms of PD are necessary in order to provide stronger conclusions regarding the action of CBD in PD."
Clinical reports have previously indicated that both CBD and/or whole-plant cannabis may address various symptom's of Parkinson's disease, including improvement in motor symptoms, pain reduction, improved sleep, and a reduction in the severity of psychotic episodes.
Survey data of patients with PD indicates that almost half of all subjects who try cannabis report experiencing subjective relief from the plant.
The abstract of the study, "Effects of cannabidiol in the treatment of patients with Parkinson's disease: An exploratory double-blind trial," appears online here.