Étiquette : toxicité

Using CBD to tame a cannabis high? Small doses may have opposite effect, Bailey Rahn, 2019

Using CBD to tame a cannabis high? Small doses may have opposite effect Bailey Rahn February 28, 2019   Share   Print (imaginima/iStock) Take some CBD, they said. You’ll feel less high, they said. This common piece of advice fed to THC-shy consumers can effectively bring someone back down to earth. It works—sometimes. But new research shows there’s likely more nuance in the solution than we initially thought. Scientists found that a high dose of CBD dampened the effects of a THC high, but participants reported a stronger high when combined with low doses of CBD. CBD can either dampen an out-of-control high [...]

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Long-Term Effects of Cannabis on Brain Structure, Giovanni Battistella et al., 2014

Long-Term Effects of Cannabis on Brain Structure Giovanni Battistella, Eleonora Fornari, Jean-Marie Annoni, Haithem Chtioui, Kim Dao, Marie Fabritius, Bernard Favrat, Jean-Frederic Mall, Philippe Maeder and Christian Giroud Neuropsychopharmacology, 2014, 39, 2041–2048. doi:10.1038/npp.2014.67   Abstract The dose-dependent toxicity of the main psychoactive component of cannabis in brain regions rich in cannabinoid CB1 receptors is well known in animal studies. However, research in humans does not show common findings across studies regarding the brain regions that are affected after long-term exposure to cannabis. In the present study, we investigate (using Voxel-based Morphometry) gray matter changes in a group of regular cannabis smokers in comparison with a group of [...]

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Hippocampal Neurotoxicity of D9-Tetrahydrocannabinol, Guy Chiu-Kai Chan et al., 1998

Hippocampal Neurotoxicity of D9-Tetrahydrocannabinol Guy Chiu-Kai Chan, Thomas R. Hinds, Soren Impey, and Daniel R. Storm The Journal of Neuroscience, 1998, 18, (14), 5322–5332 Marijuana consumption elicits diverse physiological and psychological effects in humans, including memory loss. Here we report that D9-tetrahydrocannabinol (THC), the major psychoactive component of marijuana, is toxic for hippocampal neurons. Treatment of cultured neurons or hippocampal slices with THC caused shrinkage of neuronal cell bodies and nuclei as well as genomic DNA strand breaks, hallmarks of neuronal apoptosis. Neuron death induced by THC was inhibited by nonsteroidal anti-inflammatory drugs, including indomethacin and aspirin, as well as vitamin E and [...]

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Notes from the Field : Acute Poisonings from a Synthetic Cannabinoid Sold as Cannabidiol — Utah, 2017–2018, Roberta Z. Horth et al., 2019

Notes from the Field : Acute Poisonings from a Synthetic Cannabinoid Sold as Cannabidiol — Utah, 2017–2018 Roberta Z. Horth, Barbara Crouch, B. Zane Horowitz, Amelia Prebish, Matthew Slawson,  Jennifer McNair, Chris Elsholz, Stephen Gilley, Jenny Robertson, Ilene Risk, Mary Hill, Linnea Fletcher, Wei Hou, Dallin Peterson, Karlee Adams, Dagmar Vitek, Allyn Nakashima, Angela Dunn MMWR / May 25, 2018 / Vol. 67 / No. 20 US Department of Health and Human Services/Centers for Disease Control and Prevention   On December 8, 2017, the Utah Poison Control Center (UPCC) notified the Utah Department of Health (UDOH) of reports of emergency department visits associated with reported [...]

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Consumption of Ayahuasca by Children and Pregnant Women : Medical Controversies and Religious Perspectives, Beatriz Caiuby Labate, 2011

Consumption of Ayahuasca by Children and Pregnant Women : Medical Controversies and Religious Perspectives Beatriz Caiuby Labate Journal of Psychoactive Drugs, 2011, 43, (1), 27-35. DOI: 10.1080/02791072.2011.566498   Abstract In 2010, the Brazilian Government agency responsible for drug-related issues formulated official Resolutions that categorized the consumption of ayahuasca by pregnant women and children in the Santo Daime and Uniâo do Vegetal ayahuasea-based religions as an "exercise of parental rights." Although ayahuasca groups do enjoy a relative degree of social legitimacy and formal legal recognition in Brazil, the participation of pregnant women and children nevertheless continues to provoke heated discussion. This article raises the main issues involved [...]

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Amanita muscaria: chemistry, biology, toxicology, and ethnomycology, Didier MICHELOT, Leda Maria MELENDEZ-HOWELL, 2003 

Amanita muscaria: chemistry, biology, toxicology, and ethnomycology Didier MICHELOT, Leda Maria MELENDEZ-HOWELL Mycological Research, 2003, 107, (2), 131-146. https://doi.org/10.1017/S0953756203007305   The fly agaric is a remarkable mushroom in many respects; these are its bearing, history, chemical components and the poisoning that it provokes when consumed. The ‘pantherina’ poisoning syndrome is characterized by central nervous system dysfunction. The main species responsible are Amanita muscaria and A. pantherina (Amanitaceae) ; however, some other species of the genus have been suspected for similar actions. Ibotenic acid and muscimol are the active components, and probably, some other substances detected in the latter species participate in the psychotropic effects. The [...]

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Comparison of the Neurotoxic and Seizure-Inducing Effects of Synthetic and Endogenous Cannabinoids with Δ9-Tetrahydrocannabinol

Comparison of the Neurotoxic and Seizure-Inducing Effects of Synthetic and Endogenous Cannabinoids with Δ9-Tetrahydrocannabinol Chris S. Breivogel, Jacob R. Wells, Amreen Jonas, Artik H. Mistry, Morgan L. Gravley, Rajul M. Patel, Brianna E. Whithorn, and Bonnie M. Brenseke Cannabis and Cannabinoid Research, 2019, Volume X, Number X DOI: 10.1089/can.2019.0003 Abstract Introduction : Synthetic cannabinoids (SCs) are commonly found in preparations used as recreational drugs. Although severe adverse health effects are not generally associated with cannabis use, a rising number of studies document seizures and even death after SC use. In this study, a mouse model is used to investigate the hypothesis that SCs are more [...]

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Switch to mania after ayahuasca consumption in a man with bipolar disorder : a case report, Alejandro G Szmulewicz et al., 2015

Switch to mania after ayahuasca consumption in a man with bipolar disorder : a case report Alejandro G Szmulewicz, Marina P Valerio and Jose M Smith International Journal of Bipolar Disorders, 2015, 3, (4), 1-3. DOI 10.1186/s40345-014-0020-y   Abstract Background : There is an increasing use of ayahuasca for recreational purposes. Furthermore, there is a growing evidence for the antidepressant properties of its components. However, there are no reports on the effects of this substance in the psychiatric setting. Harmaline, one of the main components of ayahuasca, is a selective and reversible MAO-A inhibitor and a serotonin reuptake inhibitor. Case report : We present the case of [...]

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From local to global—Fifty years of research on Salvia divinorum, Ivan Casselman et al., 2014

From local to global—Fifty years of research on Salvia divinorum Ivan Casselman, Catherine J. Nock, Hans Wohlmuth, Robert P. Weatherby, Michael Heinrich Journal of Ethnopharmacology, 2014, 151, 768–783 http://dx.doi.org/10.1016/j.jep.2013.11.032   a b s t r a c t Ethnopharmacological relevance : In 1962 ethnopharmacologists, Hofmann and Wasson, undertook an expedition to Oaxaca,Mexico. These two researchers were the first scientists to collecta flowering specimen of Salvia divinorum allowing theidentification ofthisspecies.Whilet he species'traditional use is confined to a very small region of Mexico, since Hofmann and Wasson's expedition 50 years ago, Salvia divinorum has become globally recognized for its main active constituent, the diterpene salvinorin A, which has [...]

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Psychedelic drugs in the treatment of anxiety, depression and addiction, Tor-Morten  KVAM et al., 2018

Psychedelic drugs in the treatment of anxiety, depression and addiction Tor-Morten  KVAM, Lowan H. STEWART, Ole A. ANDREASSEN  Tidsskrift for Den norske legeforening, 2018. Doi : 10.4045/tidsskr.17.1110   B A C K G R O U N D There is growing interest in the use of psychedelic drugs for the treatment of mental disorders. The drugs are considered safe when administered within a clinical framework. Older studies performed prior to 1970 had methodological shortcomings, but studies in recent years have shown promising results regarding the use of psychedelic drugs in unipolar depression, depression in life-threatening illness, anxiety and addiction. The aim of this literature review is [...]

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