Cannabidiol might also block some of the psychoactive effects of delta-9-tetrahydrocannabinol . If you think you may have a medical emergency, call your healthcare provider or 911 immediately. Any mention of products or services is not meant as a guarantee, endorsement, or recommendation of the products, services, or companies.One of these studies did this by having some people take some CBD before participating in public speaking. The researchers found that those who took the CBD seemed much calmer than those who did not.