A small 2010 study found that cannabidiol could reduce symptoms of social anxiety in people with social anxiety disorder (SAD). Brain scans of participants revealed changes in blood flow to the regions of the brain linked to feelings of anxiety.
In this study, cannabidiol not only made participants feel better but also changed the way their brains responded to anxiety.
A 2011 study also found that cannabidiol could reduce social anxiety. For that study, researchers looked specifically at cannabidiol to treat anxiety associated with public speaking.
Research published in 2014 found that CBD oil had anti-anxiety and antidepressant effects in an animal model.
A 2015 analysis of previous studies concluded that CBD oil is a promising treatment for numerous forms of anxiety, including social anxiety disorder, panic disorder, obsessive-compulsive disorder, generalized anxiety disorder, and post-traumatic stress disorder.
The report cautioned, however, that data on long-term use of CBD oil is limited. While research strongly points to the role of cannabidiol in treating short-term anxiety, little is known about its long-term effects, or how it can be used as a prolonged treatment.
A 2016 case study explored whether cannabidiol could reduce symptoms of post-traumatic stress disorder (PTSD) and anxiety-provoked sleep disorder in a child with a history of trauma. Researchers found that cannabidiol reduced the child's anxiety and helped her sleep.