CANNABIS

This study tests whether a non-invasive brain stimulation technique called TMS can help heavy cannabis users reduce their use. Fifty near-daily users will receive either real or fake (placebo) TMS over two weeks. Researchers will track changes in cannabis use and brain activity u…

This study looks at whether getting regulated cannabis from pharmacies helps people use it more safely compared to buying it illegally. About 1,177 regular cannabis users in Switzerland will be randomly assigned to buy from pharmacies or the illicit market. The goal is to see if …

This small study tests whether inhaling cannabis can quickly stop a migraine headache. Twenty adults with migraines will try three different strengths of cannabis and a placebo to see which one works best for pain and other symptoms like nausea or light sensitivity. The study is …

This study looks at whether cannabis oil can help reduce pain and improve quality of life in people with fibromyalgia. Researchers will track pain levels, side effects, and how well patients stick to the treatment. The study includes 65 adults who have not had success with other …

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

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking. Forty adults aged 21 to 55 who have used both substances before will take part. They will complete driving simulations and thinking tests to measure changes in performance.

This study looks at how using cannabis every day for two weeks changes pain sensitivity, the risk of abuse, and natural cannabis-like chemicals in the body. One hundred healthy adults who already use cannabis nearly daily will stay in a hospital for 15 days and receive cannabis w…

This study looks at whether stopping cannabis use for 42 days can improve memory, attention, and mood. It involves 100 identical twins who both use cannabis regularly. One twin will be asked to stop using cannabis with support, while the other continues as usual. The goal is to s…

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking in a safe, simulated setting. About 40 occasional users aged 21 to 55 will take part. The goal is to better understand the risks of driving under the influence.

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking in a driving simulator. About 40 adults aged 21 to 55 who have used both substances before will take part. The goal is to better understand the risks of driving under the influenc…

This study looks at how alcohol and cannabis, alone or together, affect driving ability and thinking in a safe, simulated setting. About 40 occasional users aged 21 to 55 will take part. The goal is to better understand the risks of driving under the influence.

This study tests whether a combined approach of stricter enforcement and staff training can reduce marijuana sales to obviously-intoxicated customers in Oregon. Researchers will send actors pretending to be drunk to marijuana stores and nearby alcohol sellers to see if they are r…

This study looks at how cannabinoids (the active chemicals in cannabis) affect short-term and long-term memory. Researchers will test memory in 80 adults aged 18–55 who have used cannabis at least once. The goal is to understand, not to treat, so no new therapies are being tested…