RATIONALE: Classic psychedelics are currently being studied as novel treatments for a range of psychiatric disorders. However, research on how psychedelics interact with other psychoactive substances remains scarce. OBJECTIVES: The current study aimed to explore the subjective effects of psychedelics when used alongside cannabis. METHODS: Participants (n = 321) completed a set of online surveys...
Abstract Background The neurobiological mechanisms underlying the effects of delta-9-tetrahydrocannabinol (THC) remain unclear. Here, we examined the spatial acute effect of THC on human on regional brain activation or blood flow (hereafter called ‘activation signal’) in a ‘core’ network of brain regions that subserve a multitude of processes. We also investigated whether the neuromodulatory...
Delta-9 tetrahydrocannabinol (THC) is a major exogenous psychoactive agent, which acts as a partial agonist on cannabinoid (CB1) receptors. THC is known to inhibit presynaptic neurotransmission and has been repeatedly linked to acute decrements in cognitive function across multiple domains. Previous electrophysiological studies of sensory gating have shown specific deficits in inhibitory...
Published studies examining the effects of cannabis have largely utilized forms of cannabis that are not representative of the legal market products currently available. The present study aimed to characterize naturalistic use of legal market flower and edible products by examining associations among blood cannabinoids and amount of THC consumed as well as physiological, cognitive, and...
Background: Impairments in various subdomains of memory have been associated with chronic cannabis use, but less is known about their neural underpinnings, especially in the domain of the brain’s oscillatory activity. Aims: To investigate neural oscillatory activity supporting working memory (WM) in regular cannabis users and non-using controls. We focused our analyses on frontal midline theta...
Archiv EuromedicaOctober 17, 2021Lavinia-Alexandra Moroianu, Marius Moroianu, Anamaria Ciubară3 citations
Marijuana is the most widely used psychoactive substance after coffee and it is used for both medical and recreational purposes. It has been known since ancient times and it seems to have been part of the mixture that was put in the pipe of “peace” by Native Americans. Marijuana is psychically addictive, but in its case, there is no physical addiction as in the case of high-risk drugs (heroin)...
Cannabis products that contain the tetrahydrocannabinol (THC) cannabinoid are emerging as promising therapeutic agents for the treatment of medical conditions such as chronic pain. THC elicits psychoactive effects through modulation of dopaminergic neurons, thereby altering levels of dopamine in the brain. This case report highlights the complexity associated with medicinal cannabis and the...
Cannabis use disorder (CUD) has doubled in prevalence over the past decade as a nation-wide trend toward legalization allows for increased drug accessibility. As a result, marijuana has become the most commonly used illicit drug in the United States particularly among the adolescent population. This is especially concerning since there is greater risk for the harmful side effects of drug use...
With increasing state legalization, marijuana use has become commonplace throughout much of the United States. Existing literature on unintentional exposure focuses primarily on children.We report on a cluster of adults with unwitting marijuana exposure. A cluster of cases were referred to the Medical Toxicology Service after ingesting marijuana-contaminated food at a family event. We conducted...
BACKGROUND Multiple sclerosis (MS) is a chronic demyelinating disease which leads to sensory, motor, autonomic, and cognitive symptoms. Cannabis is a common way for persons with MS (pwMS) to seek symptomatic therapy. Given the capacity for both cannabis and MS to cause cognitive impairment, it is important to determine whether there is any negative impact when the two co-occur. The objective of...
Background: Cannabis is the most widely used drug in the world. An association between cannabis use and mental illness, in particular psychotic illness, was recognized since long. Various cultures have traditionally used cannabis for different purposes, and continuous increasing use of cannabis is promoting psychosis also. Aim: The present study has tried to identify the differences in profile...
Clinical features of schizophrenia and cannabis-induced psychosis (CIP) share many overlapping characteristics. We present a case of Cannabis Dependence Syndrome, whose first presentation was with first-rank symptoms of schizophrenia in the form of thought insertion, withdrawal and delusion of control.
SynapseOctober 2021Kyle A Windisch, Sanoara Mazid, Megan A Johnson et al.
Our prior studies demonstrated that the rat hippocampal opioid system can undergo sex-specific adaptations to external stimuli that can influence opioid-associated learning processes. This opioid system extensively overlaps with the cannabinoid system. Moreover, acute administration of Δ9 Tetrahydrocannabinoid (THC), the primary psychoactive constituent of cannabis, can alter cognitive...
BACKGROUND Cannabis is the most used recreational drug worldwide. Its use can increase the risk of developing psychotic disorders and exacerbate their course. However, the relationship between cannabis use and dissociative symptoms has been scarcely investigated. AIMS To examine differences in psychotic and dissociative symptoms, and in functioning in first-episode psychotic patients (FEPp)...
More older adults are using cannabis for recreational and/or medical purposes, but most studies examining cognitive function and cannabis use do not include older adults. The current small pilot study sought to compare cognitive function and emotional functioning among adults age 60 and older who were regular, primarily recreational cannabis users (n = 28) and nonusers (n = 10). A bimodal...
), popularly known as marijuana, is the most commonly used psychoactive substance and is considered illicit in most countries worldwide. However, a growing body of research has provided evidence of the therapeutic properties of chemical components of cannabis known as cannabinoids against several diseases including Alzheimer's disease (AD), multiple sclerosis (MS), Parkinson's disease,...
Cannabis can be associated with acute cognitive changes. Acute cannabis intoxication results in impaired concentration, impaired attention, impulsivity, and decreases in working memory. In adults, most of the effects wear off with abstinence. Impulsivity and long-term impairment in decision making is seen in heavy cannabis users. In adolescents, cannabis use is more closely associated with...
First it was the plant, cannabis. How could this be made into a saleable profit‐making commodity when it grows in the ground? Witness the marijuana (a chemical from the plant) industry, which lobbied to make sure laws in states that legalized it banned people from growing more than a few plants.
Background We have piloted a new online knowledge translation (KT) program created to educate youth about cannabis effects, which uniquely focuses on mental health risks for Black youth. Youth are generally unaware of the research linking underage usage and the risk of psychosis. Youth from some Black racialized communities in Ontario may be disproportionately affected and in need of this...
Abstract Background Cannabis is the most widely used illicit drug in the United States and is often associated with changes in attention function, which may ultimately impact numerous other cognitive faculties (e.g. memory, executive function). Importantly, despite the increasing rates of cannabis use and widespread legalization in the United States, the neural mechanisms underlying attentional...