Cannabidiol inhibits THC-elicited paranoid symptoms and hippocampal-dependent memory impairment Amir Englund, Paul D Morrison, Judith Nottage, Dominic Hague, Fergus Kane1, Stefania Bonaccorso1, James M Stone, Avi Reichenberg, Rudolf Brenneisen, David Holt, Amanda Feilding, Lucy Walker, Robin M Murray and Shitij Kapur Journal of Psychopharmacology, 2012 Doi : 10.1177/0269881112460109 Abstract Community-based studies suggest that cannabis products that are high in Δ9-tetrahydrocannabinol (THC) but low in cannabidiol (CBD) are particularly hazardous for mental health. Laboratory-based studies are ideal for clarifying this issue because THC and CBD can be administered in pure form, under controlled conditions. In a between-subjects design, we tested the hypothesis that pre-treatment with CBD inhibited [...]
Lire la suiteCannabidiol, a Cannabis sativa constituent, as an antipsychotic drug A.W. Zuardi, J.A.S. Crippa, J.E.C. Hallak, F.A. Moreira and F.S. Guimarães Brazilian Journal of Medical and Biological Research, 2006, 39, 421-429 ISSN 0100-879X Review Abstract A high dose of Δ9-tetrahydrocannabinol, the main Cannabis sativa (cannabis) component, induces anxiety and psychotic-like symptoms in healthy volunteers. These effects of Δ9-tetrahydrocannabinol are significantly reduced by cannabidiol (CBD), a cannabis constituent which is devoid of the typical effects of the plant. This observation led us to suspect that CBD could have anxiolytic and/or antipsychotic actions. Studies in animal models and in healthy volunteers clearly suggest an anxiolytic-like effect of CBD. The [...]
Lire la suiteDissociable effects of cannabis with and without cannabidiol on the human brain’s resting-state functional connectivity Matthew B. Wall, Rebecca Pope, Tom P. Freeman, Oliwia S. Kowalczyk, Lysia Demetriou, Claire Mokrysz, Chandni Hindocha, Will Lawn, Michael A.P. Bloomfield, Abigail M. Freeman, Amanda Feilding, David J. Nutt and H. Valerie Curran Journal of Psychopharmacology, 2019, 1–9 DOI: 10.1177/0269881119841568 journals.sagepub.com/home/jop Abstract Background : Two major constituents of cannabis are Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD). THC is the main psychoactive component; CBD may buffer the user against the harmful effects of THC. Aims : We examined the effects of two strains of cannabis and placebo on the human brain’s resting-state networks [...]
Lire la suitePotency Analysis of Medical Marijuana Products from New York State Lingyun Li, Bryan C. Duffy, Lorie A. Durocher, Mark A. Dittmar, Robert A. Acosta, Emily R. Delaney, Lei Li, Kenneth M. Aldous and David C. Spink Cannabis and Cannabinoid Research, Volume X, Number X, 2019 Mary Ann Liebert, Inc. DOI: 10.1089/can.2018.0037 Abstract Introduction : In the United States, medicalmarijuana programs have been established in 29 states and the District of Columbia. In 2014, New York State (NYS) approved medical marijuana legislation, and its program became fully operational in January of 2016. Products manufactured under the auspices of the program may be used by certified patients in [...]
Lire la suitePharmacokinetics and Tolerability of Δ9-THC-Hemisuccinate in a Suppository Formulation as an Alternative to Capsules for the Systemic Delivery of Δ9-THC Mahmoud A. ElSohly, Waseem Gul, Larry A. Walker Medical Cannabis and Cannabinoids, 2018, 1, 44–53 Preclinical Science and Clinical Studies – Research Article DOI: 10.1159/000489037 Abstract The objectives of this study were: (1) to assess the safety, tolerability, and pharmacokinetics of ascending doses of Δ9- tetrahydrocannabinol-hemisuccinate (THC-HS) after rectal administration as suppositories in male volunteers; and (2) to compare the pharmacokinetics of oral administration of Δ9-tetrahydrocannabinol (Δ9-THC) with an equivalent amount of Δ9-THC delivered as THC-HS via the suppository formulation. In support of the pharmacokinetic evaluations, [...]
Lire la suiteHuman Pharmacokinetics and Adverse Effects of Pulmonary and Intravenous THC-CBD Formulations Pascale Meyer, Manuela Langos, Rudolf Brenneisen Medical Cannabis and Cannabinoids, 2018, 1, 36–43 Preclinical Science and Clinical Studies – Research Article DOI: 10.1159/000489034 Abstract Background : Due to variable absorption and extensive firstpass metabolism, the bioavailability of oral delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) is low, and, therefore, alternative application forms are necessary. Methods : In an open-label, 2-period phase-1 study on 11 healthy volunteers, a combination of THC and CBD was compared by pulmonary (inh) and intravenous (iv) application. The liquid aerosol was produced by an in vitro validated pressurized metered-dose inhaler (pMDI) device, releasing 41–44% [...]
Lire la suiteMedical Cannabis and Cannabinoids : An Option for the Treatment of Inflammatory Bowel Disease and Cancer of the Colon? Magdalena Grill, Carina Hasenoehrl, Martin Storr, Rudolf Schicho Medical Cannabis and Cannabinoids, 2018, 1, 28–35 © 2018 The Author(s) Published by S. Karger AG, Basel E-Mail karger@karger.com www.karger.com/mca DOI: 10.1159/000489036 Abstract : In the past few years, we have witnessed a surge of new reports dealing with the role of cannabinoids, synthetic as well as herbal, in the mechanisms of inflammation and carcinogenesis. However, despite the wealth of in vitro data and anecdotal reports, evidence that cannabinoids could act as beneficial drugs in inflammatory bowel disease (IBD) or in [...]
Lire la suiteIndividual and combined effects of acute delta-9-tetrahydrocannabinol and cannabidiol on psychotomimetic symptoms and memory function Celia J. A. Morgan, Tom P. Freeman, Chandni Hindocha, Grainne Schafer, Chelsea Gardner and H. Valerie Curran Translational Psychiatry, 2018, 8, 181 DOI 10.1038/s41398-018-0191-x https://www.researchgate.net/publication/264860201 Abstract The main active ingredient in cannabis, delta-9-tetrahydrocannabinol (THC), can acutely induce psychotic symptoms and impair episodic and working memory. Another major constituent, cannabidiol (CBD), may attenuate these effects. This study aimed to determine the effects of THC and CBD, both alone and in combination on psychotic symptoms and memory function. A randomised, double-blind crossover design compared the effects of (i) placebo, (ii) THC 8mg, (iii) CBD [...]
Lire la suiteThe pharmacokinetics and the pharmacodynamics of cannabinoids Catherine J. Lucas, Peter Galettis and Jennifer Schneider British Journal of Clinical Pharmacology, 2018, 84, 2477–2482 DOI:10.1111/bcp.13710 Abstract : There is increasing interest in the use of cannabinoids for disease and symptom management, but limited information available regarding their pharmacokinetics and pharmacodynamics to guide prescribers. Cannabis medicines contain a wide variety of chemical compounds, including the cannabinoids delta-9-tetrahydrocannabinol (THC), which is psychoactive, and the nonpsychoactive cannabidiol (CBD). Cannabis use is associated with both pathological and behavioural toxicity and, accordingly, is contraindicated in the context of significant psychiatric, cardiovascular, renal or hepatic illness. The pharmacokinetics of cannabinoids and the [...]
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