Cited by 12Cannabis and Cannabinoid ResearchSchizophrenia research and treatmentForensic Toxicology and Drug Analysis

Guanfacine attenuates adverse effects of dronabinol (THC) on working memory in adolescent-onset heavy cannabis users: A pilot study

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Mathai, David S., Holst, Manuela, Rodgman, Christopher, Haile, Colin N., Keller, Jake, Hussain, Mariyah Z., Kosten, Thomas R., Newton, Thomas F. +1 more·2018·The Journal of Neuropsychiatry and Clinical Neurosciences

Abstract

The cannabinoid-1 receptor (CB1R) agonist Δ9-tetrahydrocannabinol (THC), the main psychoactive constituent of cannabis, adversely effects working memory performance in humans. The α2A-adrenoceptor (AR) agonist guanfacine improves working memory performance in humans. The authors aimed to determine the effects of short-term (6 days) treatment with guanfacine on adverse cognitive effects produced by THC. Employing a double-blind, placebo-controlled crossover design, the cognitive, subjective, and cardiovascular effects produced by oral THC (20 mg) administration were determined twice in the same cannabis users: once after treatment with placebo and once after treatment with guanfacine (3 mg/day). Compared with performance at baseline, THC negatively affected accuracy on spatial working memory trials while participants were maintained on placebo (p=0.012) but not guanfacine (p=0.497); compared with placebo, accuracy was significantly (p=0.003, Cohen's d=-0.640) improved while individuals were treated with guanfacine. Similarly, compared with baseline, THC increased omission errors on an attentional task while participants were maintained on placebo (p=0.017) but not on guanfacine (p=0.709); compared with placebo, there were significantly (p=0.034, Cohen's d=0.838) fewer omissions while individuals were maintained on guanfacine. Although THC increased visual analog scores of subjective effects and heart rate, these increases were similar during treatment with placebo and guanfacine. THC did not significantly affect performance of a recognition memory task or blood pressure while individuals were maintained on either treatment. Although preliminary, these results suggest that guanfacine warrants further testing as a potential treatment for cannabis-induced cognitive deficits.

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  1. Taneja I, Haman K, Shelton RC, et al: A randomized, double-blind, crossover trial of modafinil on mood. J Clin Psychopharmacol 2007; 27:76-79 79. Wesensten NJ: Effects of modafinil on cognitive performance and alertness during sleep deprivation. Curr Pharm Des 2006; 12: 2457-2471
  2. Steere JC, Arnsten AF: The alpha-2A noradrenergic receptor agonist guanfacine improves visual object discrimination reversal perfor- mance in aged rhesus monkeys. Behav Neurosci 1997; 111:883-891

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Authors
Mathai, D. S., Holst, M., Rodgman, C., Haile, C. N., Keller, J., Hussain, M. Z., Kosten, T. R., Newton, T. F., & Verrico, C. D.
Affiliations
Baylor College of Medicine (US)
Venue
The Journal of Neuropsychiatry and Clinical Neurosciences
Published
2018-01
Volume
30
Issue
1
Pages
66-76
ISSN
  • 0895-0172 (ISSN-L)
  • 1545-7222
OpenAlex
W2685068722
Cited by
12
References
85
Citations by year
2026: 1 · 2023: 3 · 2022: 2 · 2020: 2 · 2019: 3 · 2018: 1
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuropsychiatry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Forensic Toxicology and Drug Analysis
Keywords
guanfacine, dronabinol, tetrahydrocannabinol, cannabis use, working memory, cognitive impairment, cannabinoid 1 receptor, alpha2A-adrenergic receptor, attention, subjective effects, heart rate, blood pressure, recognition memory
MeSH terms
Adolescent, Adult, Analysis of Variance, Blood Pressure, Double-Blind Method, Female, Heart Rate, Humans, Male, Marijuana Smoking, Memory Disorders, Memory, Short-Term, Middle Aged, Neuropsychological Tests, Pilot Projects, Dronabinol, Guanfacine, Cross-Over Studies, Young Adult, Adrenergic alpha-2 Receptor Agonists, Cannabinoid Receptor Agonists

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