CANNABIS USE

This study is creating and testing a new support program to help pregnant and postpartum people quit using tobacco and cannabis. Researchers will work with 25 participants to design activities that help them track their habits and manage mood. The goal is to help people quit duri…

This study is creating and testing a program to help family members of young adults with psychosis communicate more effectively about cannabis use. The program teaches family members new communication skills with the goal of reducing caregiver stress and potentially helping their…

This study is testing a free online school program called SMART TALK, designed to prevent cannabis use among teenagers. It will involve about 10,800 middle and high school students. Researchers want to see if the educational lessons change students' intentions and actual use of c…

This study aims to see if specific cannabis compounds (THC, CBD, or a mix) can help veterans struggling with PTSD and suicidal thoughts. 500 veterans will be randomly assigned to smoke one of four types of cannabis or a placebo daily for 12 weeks. Researchers will track changes i…

This study aims to understand why people's moods, behaviors, and brain responses vary after using recreational drugs like cannabis. Researchers will use brain scans (fMRI) and computer tasks to measure how young adults anticipate rewards and learn from them. The goal is to gather…

This study aims to see if teaching people with eating disorders about how cannabis (marijuana) can affect their mental health and treatment helps them learn the risks and want to use less. 80 participants will receive standard eating disorder treatment for 20 weeks. In the first …

This study investigates how online cannabis ads that claim to help with anxiety and depression affect what people buy. Researchers will have 2000 adults with symptoms of anxiety or depression use a simulated online cannabis store. They will test if these therapeutic claims make p…

This study aims to understand how a history of cannabis use affects the severity and course of psychosis symptoms in people hospitalized for methamphetamine-induced psychosis. Researchers will follow 90 hospitalized patients for eight weeks, comparing those with and without signi…

This study aims to find out which warning labels work best on cannabis edible packaging. Researchers will show 1,250 U.S. residents different package designs to see which warnings improve understanding of risks, like accidental overconsumption, and affect people's interest in try…

This study aims to see if tracking eye movements can accurately detect impairment from THC, the main active ingredient in cannabis. Researchers will give different doses of THC or a placebo to 40 frequent and infrequent cannabis users and test their eye control and attention. The…

This study aims to understand how two common cannabis compounds, THC and myrcene, affect people when inhaled. Researchers at Johns Hopkins will have 32 healthy adults try different combinations of these substances and a placebo. The main goal is to measure how strong the drug eff…

This study aims to understand how a moderate dose of THC (the main active ingredient in cannabis) affects a person's mood, stress response, and thinking skills. Researchers will recruit 90 adults who use cannabis at least weekly. Each participant will attend two lab sessions—one …