Cannabis dependence

This study tests a program called Just Care for Families, designed to help parents in rural Oregon who are involved with child welfare services and struggle with opioid or methamphetamine use. The program combines substance use treatment, mental health support, parenting training…

This study looks at whether allowing regular cannabis users to buy regulated cannabis from pharmacies helps them switch to safer ways of using it, like vaping or edibles, instead of smoking. About 1,177 participants in Switzerland are randomly assigned to buy from pharmacies or s…

This study is testing a special kiosk placed in rural Appalachian Kentucky that provides clean syringes and harm reduction supplies to people who inject drugs. The goal is to see if the kiosk helps reduce the spread of HIV and hepatitis C, and lowers the risk of drug overdose. Ab…

This study tests whether intensive home-based psychiatric treatment can help children and teens with mental health disorders as an alternative to being in the hospital. Over 3 months, participants receive 3 to 7 home visits per week from a team of doctors, therapists, and other s…

This study compares two ways to help people with both substance use and mental health disorders: a full team-based program called MISSION that provides counseling, peer support, and community outreach for 6 months, versus just linking them with a peer specialist. Researchers hope…

This study compares cannabidiol (CBD) to the standard antipsychotic risperidone in 64 adults with schizophrenia or related psychotic disorders who have used cannabis. The goal is to see if CBD can reduce psychotic symptoms and help people stop or cut down cannabis use. Participan…

This study looks at whether having a trained peer (someone with similar experiences) as a case manager can help people with HIV who also have mental health or substance use problems get the care they need. About 405 adults from an HIV clinic will be randomly assigned to either us…

This study tests a program called MOMENT-V that combines two counseling sessions with a smartphone app to help young adults reduce cannabis use. About 65 participants will either use the full program or have a brief counseling session. Researchers will check if the program is eas…

This study tests whether referring Veterans in early recovery from substance use disorder to work-focused programs (like supported employment) helps them stay sober and function better. About 100 Veterans will be randomly assigned to get the work referral or usual treatment alone…

This study aims to eliminate hepatitis C among people who use drugs in Paris, Marseille, Lyon, and Fort-de-France. Researchers will screen participants, provide immediate treatment, and use a peer-referral system to reach more people. The goal is to see if this community-based ap…

This study tests whether training store staff and increasing enforcement can reduce marijuana sales to obviously-intoxicated customers. Researchers will send actors pretending to be drunk to buy marijuana and see if stores refuse the sale. The goal is to prevent impaired driving …

This study tests a program called Omnis Salutis for recent veterans with PTSD, depression, anxiety, or substance use disorders. The program teaches veterans to identify their health goals and communicate them to doctors and family. Researchers want to see if it improves social an…

This study looks at whether terpenes—natural compounds found in plants—can reduce pain when taken alone or with THC. Researchers will test 45 adults who use cannabis regularly to measure pain relief and any feelings of being high or drug liking. The goal is to find safer ways to …

This study tests a text-message counseling program designed to help young adults ages 18 to 25 reduce or stop their cannabis use. Participants must use cannabis at least three days a week and live in Tennessee or Colorado. The program uses peer support and counseling delivered vi…

This pilot study tests a specific type of drama therapy for people who have both a mental health condition (like depression or bipolar disorder) and a substance use disorder. Ten participants will attend weekly group drama therapy sessions for 12 weeks, then put on a performance.…

This pilot study tested three different strengths of inhaled cannabis (2.5%, 5%, and 10% THC) against a placebo to see if they could quickly relieve migraine headaches. Twenty adults with migraine took part in a crossover design, meaning each person tried all options. The main go…

This study tests whether adding trauma-informed coping strategies and peer coaching to a standard mobile brief intervention helps young adults (ages 18-25) who drink heavily and have experienced interpersonal trauma reduce their alcohol use. 225 college students will be randomly …

This study tests whether a non-invasive brain stimulation technique called TMS can reduce attention to cannabis cues and help heavy users cut down. Fifty near-daily cannabis users will receive either real or placebo TMS over five days, then be followed for four weeks. The goal is…

This study tests a group therapy called Awareness, Courage, and Love (ACL) for older adults with psychiatric disorders who feel lonely. The therapy focuses on mindfulness, sharing feelings, and building connections. Researchers want to see if the program is practical and helpful …

This study looks at how two parts of cannabis, THC and CBD, affect thinking and bladder symptoms in people with Multiple Sclerosis (MS). Thirty adults with MS will take either THC or CBD oil for 15 weeks and complete tests and questionnaires. The goal is to see if one compound he…

This study looks at whether cannabis oil can help reduce pain and improve sleep and quality of life in people with fibromyalgia who have not found relief from other treatments. Researchers will track pain levels, side effects, and how well patients stick to the treatment. The goa…

This study tests a 10-week program called 'Grow to Recovery' for people with mental illness. The program is co-led by a peer (someone who also has a mental illness) and a professional. Researchers want to see if it helps participants feel more hopeful and capable. 138 people are …

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

This study from Mayo Clinic tests whether a smartphone app called Senyo Health can help connect people with substance use disorders to treatment through their primary care doctor. Sixty participants will use the app for 12 weeks, which includes therapy modules, weekly check-ins w…

This study looks at medical records of 50 cancer patients who say cannabis helped stop their tumor from growing or shrank it. Researchers want to see if there is real evidence behind these claims. The goal is to gather information, not to test a new treatment.

This study looks at how cannabis use changes natural brain chemicals in adolescents aged 14 to 25. Researchers will measure cannabinoid and endorphin levels in blood to find markers that could tell which teens might relapse and which stay sober. The goal is to better understand c…

This study looks at how small amounts of alcohol and THC (the active part of cannabis) affect driving in a simulator. Forty adults aged 21 to 55 who have used both substances before will take part. The goal is to understand how these drugs change driving performance and thinking,…

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking. About 40 occasional cannabis users who also drink alcohol will use a driving simulator after taking controlled doses. The goal is to understand the risks of driving under the inf…

This study looks at how alcohol and cannabis, alone or together, affect driving and thinking. About 40 occasional users aged 21–55 will take part. They will inhale low-dose THC (like a quarter of a joint) and drink alcohol, then test their driving on a simulator and complete ques…

This study at Yale University looks at how THC, the active ingredient in cannabis, affects short-term and long-term memory. Researchers will give 80 adults who have used cannabis before either a low dose of THC or a placebo and then test their memory. The goal is to better unders…

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking. About 40 adults aged 21–55 who have used both substances before will take part. They will complete simulated driving tests and questionnaires after receiving the substances. The …

This study looks at what happens when people who use cannabis regularly take it daily for two weeks. Researchers will measure pain sensitivity, feelings of a 'good drug effect,' and natural cannabis-like chemicals in the blood. The goal is to understand if daily use changes pain …

This study looks at whether young adults (ages 21-25) who use high-potency cannabis concentrates can improve their memory and thinking by switching to less potent products. Researchers will test participants' cognitive performance and collect blood and urine samples. The goal is …

This study tests a machine-learning tool that gives doctors a pop-up alert when they prescribe opioids to a patient at high risk of overdose. The alert explains why the patient is at risk and suggests safer options, like prescribing naloxone or referring to pain therapy. Research…

This study looks at how daily cannabis smoking changes pain sensitivity and the risk of abuse in healthy adults who already use cannabis. Researchers will measure pain tolerance and withdrawal symptoms over 16 days in a controlled hospital setting. The goal is to understand if ca…

This study aimed to understand how a person's socioeconomic status (like income and education) affects their recovery from substance use disorder. Researchers planned to follow adults in early recovery for up to 3 years, measuring changes in social functioning, quality of life, a…

This study is developing and testing a smartphone app called R-Assist for people recently released from jail who have both substance use and mental health disorders. The app tracks symptoms, connects users to resources like housing and recovery groups, and measures how easy it is…

This observational study will follow 384 patients in Brazil who are using cannabis-based products (like CBD or THC oils) prescribed by their own doctors for chronic pain, anxiety, or depression. Researchers will not provide the medication but will track patients' quality of life,…

This study looks at tobacco, cannabis, and other drug use among homeless and at-risk youth in downtown Ottawa. Researchers will follow 520 participants aged 16 and older who are homeless or insecurely housed and have a history of cannabis use and mental illness. The goal is to un…

This study aims to find out how many pregnant women in Slovenia use alcohol or cannabis by testing their newborns' first stool (meconium) and asking mothers to fill out a survey. Researchers will also compare the gut bacteria of babies exposed to these substances with those who w…

This study looks at how different types of cannabis oil (high or low CBD-to-THC ratio) affect stress and self-control in healthy adults aged 19-35 who use cannabis occasionally. Participants will undergo brain scans and stress tests to measure changes in brain activity, stress ho…

This study aimed to see if a drug called AEF0117 changes how the body processes THC from cannabis. It was designed for healthy adults aged 21-55 who use cannabis. The trial was withdrawn before enrolling anyone, so no results are available.

This study tests whether a "Care Navigator" — a personal guide — can help people with substance use problems start and stay in treatment. About 360 adults who call a mental health access center will be randomly assigned to get usual care or extra help from a navigator. The goal i…

This study uses identical twins who both use cannabis to see if quitting for 42 days improves memory, attention, and mental health symptoms. One twin is paid to stop using cannabis, while the other continues as usual. Researchers will compare changes in thinking skills and mood b…

This study looks at how different patterns of cannabis use (like how often, how long, and what type) affect anesthesia needs and inflammation in people having lumbar spine surgery. Researchers will measure the amount of anesthesia and pain medication needed during surgery, as wel…

This study follows 192 teens aged 12 to 20 who are already receiving either Cognitive Behavioral Therapy (CBT) or Brief Strategic Therapy (BST) for anxiety, depression, or OCD. Researchers will track their progress using questionnaires and interviews over 9 months. The goal is to…

This study will use brain scans to see how cannabis affects inflammation and brain activity in up to 100 U.S. military veterans with PTSD and suicidal thoughts. Participants will take cannabis for 12 weeks and have PET and MRI scans before and after. The goal is to link brain cha…

This early study is testing whether focused ultrasound, a non-invasive technique that uses sound waves to target specific brain areas, is safe and feasible for people with opioid or other substance use disorders. The study involves 20 adults aged 22-60 who are currently in treatm…