CANNABIS USE

This study tests a free online curriculum called Smart Talk, designed to teach middle and high school students about cannabis and discourage its use. Researchers will measure whether the program changes students' intentions to use cannabis and their actual use. Over 10,000 studen…

This study looks at whether cannabis can help veterans who have PTSD and thoughts of suicide. About 500 veterans who have used cannabis in the past year will be randomly assigned to different groups. Researchers will track changes in PTSD symptoms, mood, and suicide risk over tim…

This study will work with 25 pregnant people who use tobacco and cannabis to create a support program that addresses depressive symptoms. The goal is to help them quit and stay quit after giving birth. The study focuses on understanding what participants find helpful and acceptab…

This study will test a mobile app called Joint Effort 2.0, designed to help adults in Quebec use cannabis more safely. About 110 people who currently use cannabis for non-medical reasons will use the app and report how often they adopt protective strategies, like setting limits o…

This study looks at whether teaching people with eating disorders about the risks of cannabis (marijuana) use can increase their knowledge and motivation to cut back. About 80 participants will get either cannabis education or sleep education during their 20-week eating disorder …

This study looks at how different doses of THC (the active ingredient in cannabis) affect eye movements and attention in people who use cannabis often versus rarely. Researchers will give 40 healthy adults either a placebo, a low dose, or a high dose of THC and test their eye con…

This study aims to create and test a program that teaches family members new ways to talk to their young adult loved one who has psychosis and uses cannabis heavily. The goal is to help families communicate better, reduce stress, and possibly encourage their loved one to cut back…

This study looks at how online cannabis ads that claim to treat anxiety or depression affect what people buy. About 2,000 light-to-moderate cannabis users with mild to severe anxiety or depression will shop in a realistic online store. Researchers will see if these ads make peopl…

This early-stage study will look at how vaporized beta-myrcene (a compound found in cannabis and other plants) and THC affect healthy adults who use cannabis. Researchers want to understand how these substances interact in the body and what effects they produce. The study involve…

This study looks at how a moderate dose of THC (the active part of cannabis) affects mood, stress, and thinking in people who use cannabis at least once a week. Ninety adults will take part in two sessions where they vape either real cannabis or a placebo, then complete memory an…

This study aims to develop and test a brief online program for young adult couples (ages 18-29) who use both alcohol and cannabis. The program includes self-paced modules over 3-5 weeks to help reduce substance misuse and improve relationship skills. Researchers will compare coup…

This study looks at how different warning labels on cannabis edibles change what people know, how safe they think the product is, and whether they want to try it. About 1,250 English-speaking U.S. adults will view packages with various warnings and answer questions. The goal is t…

This study looks at how mood, behavior, and brain activity change in young adults (ages 18-21) who use cannabis. Researchers will use brain scans and questionnaires to understand why some people react differently to recreational drugs. The goal is to learn more about substance us…

This study looks at how the way cannabis products are labeled and marketed changes what people think about them. About 2000 adults from states where recreational cannabis is legal will answer online survey questions after seeing a product ad. The goal is to understand how labels …

This study will follow 90 adults hospitalized with methamphetamine-induced psychotic disorder to see if those who also use cannabis have different psychiatric symptoms. Participants will be split into two groups based on lifetime cannabis use and assessed weekly for 8 weeks using…