View clinical trials related to Cannabis Use.
Filter by:The purpose of this study is to evaluate quantitatively and qualitatively a mobile application, Joint Effort, targeting safe cannabis use among consumers. This randomized controlled trial is currently conducted on the Joint Effort mobile application.
This study will examine the acute effects of cannabis on various aspects of memory. Eligible participants will complete a drug screen. Participants who pass the drug screen will be asked to wear an Empatica E4 wristband for the duration of the study. Participants will provide a saliva sample from which cortisol will be extracted. They will then complete baseline measures of cannabis consumption patterns, level of intoxication, mood, anxiety, stress, and verbal intelligence. Next, participants will be randomly assigned to inhale vapor from cannabis containing 20mg THC, 40mg THC, or placebo; both cannabis and placebo will be obtained from the National Institute on Drug Abuse (NIDA). Participants will then will complete a battery of memory tests including tests of prospective, verbal, visuospatial, source, verbal working, visuospatial working, false, and temporal order memory. Memory tests will be completed across two blocks in a counterbalanced order. Saliva samples will be obtained two additional times after drug/placebo administration. Ratings of intoxication, mood, anxiety, and stress will be obtained three additional times after drug/placebo administration. The investigators hypothesize that participants who are randomly assigned to inhale cannabis vapor will perform worse on all memory tests than participants who inhale the placebo.
The study will test a computerized treatment with subjects ages 13-17 years who are seeking treatment for alcohol and/or cannabis use. Follow-up assessments will be conducted at one- and three-months following treatment.
The aim of the study is to examine the effect of cannabis use on brain synaptic density among older adults using [11C]UCB-J PET imaging.
Cognitive impairment is well established in people with psychosis and is associated with cannabis use. The current study will investigate the neurobiological basis of cognitive change associated with 28-days of cannabis abstinence in people with psychosis and non-psychiatric controls with cannabis use. Participants will be randomized to a cannabis abstinent group or a non-abstinent control group and will undergo magnetic resonance imaging at baseline and following 28-days of abstinence. This study will help characterize the neuropathophysiological processes underlying cognitive dysfunction associated with cannabis use and its recovery which may guide the development of novel interventions for problematic cannabis use.
This project seeks to learn more about the effects of cannabis use on the endocannabinoid system and endogenous opioid systems in adolescents to address a fundamental gap in knowledge and identify biomarkers that may help distinguish youth who relapse from youth who remain sober.
This study employs a repeated measures experimental design to examine the effect of THC-dominant dose of cannabis and CBD-dominant dose of cannabis, relative to placebo, on subsequent drinking in an alcohol choice task in which participants choose either to drink or receive monetary reinforcement for drinks not consumed. Cannabis will be administered simultaneously with an alcohol-priming dose or alcohol placebo. The study will enroll up to 350 nontreatment-seeking heavy episodic alcohol drinkers who use cannabis weekly.
College students' risky drinking and cannabis use are major public health problems. The harms associated with risky drinking have been well-documented (such as deaths, blackouts, injuries, assaults, arrests, sexual consequences, academic consequences). Both college health administrators and parents have requested electronic parent-based interventions (e-PBIs) with additional content on cannabis. Parents have demonstrated ample motivation to communicate with their teens. The proposed research will attempt to enhance an existing effective e-PBI, curb the alarming trends noted in the literature, and move the field forward by conducting a randomized controlled trial testing a modified version of the e-PBI that includes updated content including the most up-to-date scientific information from cannabis studies (e-PBI+).
With perinatal cannabis use rising in Canada, robust data on short-term and long-term effects on newborns are urgently needed. However, past barriers to obtain robust data included limited sample sizes, low self-reporting and no account of postpartum exposures. Therefore, this study will be conducted as a feasibility pilot study to tease out limitations that were present in previous studies. This study will help us dictate how to conduct a larger prospective cohort study to answer any knowledge gaps currently in the field of perinatal cannabis use.
Rationale: Opioid misuse and abuse are common problems in the Western world. The rate of unintentional drug overdose is rapidly increasing, not only in the Unites States but also in the Netherlands. Additionally, it is well known that opioids are often used (and abused) in combination with other legal or illicit substances, for example cannabis, including medicinal (i.e. doctor prescribed) cannabis. A major opioid-induced adverse effect is respiratory depression and there are no data that show how oxycodone interacts with cannabis on the ventilatory control system. An appreciable effect is possible given the sedative effects of cannabis. Moreover, investigators previously showed that combining even a low dose of oxycodone (20 mg) with ethanol increased the likelihood of an apneic event (van der Schrier et al. Anesthesiology 2017; 102: 115-122). Because of this side effect and also due to the rising number of addicted chronic opioid users, there is an increasing imminent societal, political and medical interest in advancing research on opioids, opioid-drug interaction and alternatives for the treatment of various chronic illnesses and chronic pain. Hypothesis: The investigators hypothesize that cannabis will amplify the ventilatory depressant effect of oxycodone (primary end-point). Objective: The objective of the study is to quantify the interactive effect of Δ9-tetrahydrocannabinol (THC) and oxycodone on ventilatory control. Study design: Double blind, randomized cross-over, placebo-controlled design. Study population: Healthy human volunteers between the age of 18 and 45 years old. Intervention: Visit A: placebo capsule at t = 0 min + Bedrocan (22.4 mg THC) at t = 90 and 270 min; Visit B: oxycodone 20 mg at t = 0 min + Bedrocan (22.4 mg THC) at t = 90 and 270 min. Main study parameters/endpoints: Primary endpoint: The effect of inhaled THC on ventilation at an end-tidal PCO2 = 55 mmHg without and with concomitant intake of 20 mg oxycodone immediate release (IR) capsule in healthy volunteers 120 min after oxycodone intake. Secondary endpoints: (1) Outcome of Bowdle and Bond & Lader questionnaires; (2) Level of sedation; (3) Pain Pressure Threshold; (4) slope of the hypercapnic ventilatory response; (5) plasma concentrations of THC, 11-OH-THC and oxycodone; a secondary analysis will be performed on the pharmacokinetic and pharmacodynamic data (PKPD modeling).