View clinical trials related to Marijuana.
Filter by:The acute effects of cannabis may differ between adolescents and adults. Furthermore, these effects may be tempered by the presence of cannabidiol. This double-blind, placebo-controlled, crossover experiment investigates the acute effects of cannabis (with and without cannabidiol) on subjective effects, behavioural responses and neural functioning in 16-17 year-olds and 26-29 year-olds who regularly use cannabis (0.5-3 days per week).
Marijuana use has increased since its legalization in Canada and many believe that it may help patients that are experiencing chronic pain. The investigators want to assess if patients who have used marijuana chronically will need more medication to control their pain after they have undergone orthopedic trauma surgery (ex. Hip, femur, humerus fractures etc.). In this study, the investigators will identify chronic marijuana users (ie. those using for 3 months or more) who are undergoing orthopedic trauma surgery to assess how much pain medication they need post-operatively and compare this with non-users. The investigators will also evaluate their pain scores, pain medication use and other complications that they may have during or after their surgeries, including any nausea/vomiting, heart or breathing problems.
This study will examine how discounted vouchers for medical cannabis use affects opioid analgesic use in adults with chronic pain. Our study findings will have critically important implications to shape clinical care and medical cannabis policies.
The study will examine how medical cannabis use affects opioid analgesic use. This landmark study will be among the first to examine the effect of medical cannabis with different THC/CBD (Tetrahydrocannibinol/Cannabidiol) content on opioid use as well as adverse events.
The purpose of this study is to develop and evaluate an intervention that adapts Community Reinforcement and Family Training (CRAFT) for families experiencing first episode psychosis and substance use delivered via telemedicine (video conferencing). The intervention aims to improve treatment engagement and reduce distress, and it will be delivered via telemedicine (CRAFT-FT). To assess feasibility of the intervention, family members will complete the sessions and provide feedback to refine the treatment manual. Data on client relatives with psychosis will be collected for preliminary assessment purposes. Client relatives will not complete the research study intervention.
This study will examine the effects of various strains of marijuana on simulated driving performance; the effects of alcohol administration will also be examined to further understand how marijuana-induced driving changes compare to the effects of alcohol. Secondary outcomes will include physiological effects, subjective- and observer-rated outcomes, and psychomotor performance under the various dose conditions.
This study tests the feasibility of an intervention to prevent risky alcohol or marijuana use that adds a 4-week course of tailored text messaging to a brief motivational intervention for 13-18-year-old adolescents.
The study will examine how medical cannabis use affects opioid analgesic use over time, with particular attention to THC/CBD content, HIV outcomes, and severe adverse events.
This laboratory study will employ a repeated measures experimental design to examine the effect of high (7.2% THC) and moderate (3% THC) dose of marijuana, relative to placebo, on alcohol craving and on behavioral economic measure of alcohol demand after exposure to alcohol cues, and on subsequent drinking in an alcohol choice task in which participants choose either to drink or receive monetary reinforcement for drinks not consume. The study will recruit 173 non-treatment seeking heavy episodic alcohol drinkers who smoke marijuana at least twice weekly.
This study adapts the Public Health Service (PHS) 5As model for use with adolescent marijuana users and pilot the intervention to test feasibility and acceptability in pediatric primary care settings. The specific aims are as follows: Aim 1: Develop a marijuana screening and brief counseling intervention for adolescents based on the Public Health Service 5As model and previously developed adolescent smoking cessation intervention. Hypothesis 1: The 5As model can be adapted for use as a marijuana screening and counseling intervention for adolescents. Aim 2: Test the feasibility and acceptability of the 5As marijuana screening and brief counseling intervention in pediatric primary care practice. Hypothesis 2a: Pediatric clinicians will find the 5As intervention feasible and acceptable for addressing marijuana use in routine clinical visits with adolescents and their families; and Hypothesis 2b: Adolescents will find the 5As intervention delivered by their clinicians to be acceptable in the context of routine preventive services delivery.