Depression and sleep disturbances are common symptoms of depression, and CBD appears to have antidepressant effects. In studies in rats, CBD reduced depressive-like behaviors and improved their ability to deal with stressful situations. CBD acts more quickly than conventional antidepressants, researchers found. Moreover, CBD acts more rapidly than conventional antidepressants, making it more effective in treating depression. According to Samia Joca, a fellow at the Aarhus Institute for Advanced Studies and associate professor at the University of Sao Paulo, CBD inhibits depressive behaviors faster than other antidepressants.