CANNABIS USE

This study will test whether cannabis can reduce the severity of opioid withdrawal and make opioid use safer. One hundred adults with opioid use disorder will live in a hospital for about six weeks. Researchers will give them cannabis and a small dose of opioids to see how their …

This pilot study tests whether repetitive transcranial magnetic stimulation (rTMS) can strengthen a brain circuit linked to staying away from cannabis. Fifty treatment-seeking youth aged 15–21 with cannabis use disorder will receive either real or sham rTMS. Researchers will chec…

Stanford University is testing a free online toolkit called Smart Talk to see if it can prevent cannabis use among middle and high school students. The study will enroll 10,800 students across participating schools. The curriculum includes lessons, quizzes, and activities to chan…

This study is developing and testing a brief online program for young adult couples (ages 18-29) who use both alcohol and cannabis. The program aims to reduce risky substance use and improve relationship skills. Sixty couples in Washington State will be randomly assigned to eithe…

This study is for pregnant people who use tobacco and cannabis and want to quit. Researchers will test a program that helps with depressive symptoms to make quitting easier. The study involves 25 participants and will measure how well the program works and if people stick with it…

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 take part. Researchers will track changes in PTSD symptoms, mood, and suicide risk over time using interviews and question…

This study will test whether cannabis can reduce the desire to take opioids in people with opioid use disorder. Thirty participants will live in a hospital for six weeks and receive either cannabis or a placebo, along with opioids. Researchers will measure how many times particip…

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—one with active cannabis and one with a placebo—without knowing which they…

This study looks at how different doses of THC (the active ingredient in cannabis) affect eye movements and attention. Researchers will test 40 adults—some who use cannabis often and some who use it rarely—to see if eye-tracking can reliably detect impairment. The goal is to deve…

This study will follow 90 people hospitalized with methamphetamine-induced psychotic disorder, comparing those who have also used cannabis in their lifetime to those who have not. Researchers will assess psychiatric symptoms, insight, addiction severity, and sleep quality weekly …

This early-stage study will give 32 healthy adults who use cannabis vaporized THC, beta-myrcene, or a placebo to see how these substances affect their feelings of being high and sleepy. Researchers want to learn how beta-myrcene, a compound found in cannabis and other plants, cha…

This study tests whether a brief education session about cannabis risks can increase knowledge and motivation to reduce use among people with eating disorders. 80 patients will receive either cannabis education or sleep hygiene education during their first week of a 20-week eatin…

This early-phase study will give 144 healthy young adults (ages 18-21) a single dose of THC (7.5 mg) or a placebo in a capsule, then use brain scans and behavioral tasks to measure how THC affects mood, reward processing, and learning. The goal is to understand why some people re…

This study is developing and testing a program called Cannabis Conversation Skills for Families (CCSF) that teaches family members communication skills to encourage their young adult loved one with first episode psychosis to reduce cannabis use. The program includes education abo…