It’s my opinion that the government should step up, so we can do clinical trials and get this out to people,” Blessing says. CBD is in early clinical trials for treating post-traumatic stress disorder and schizophrenia, says Blessing, who is currently studying whether CBD could be used to treat PTSD in people with alcohol use disorder. Scientists say that there’s a growing body of evidence that CBD can treat other illnesses besides seizure syndromes, but they emphasize that scientific research is in its very early stages. Companies that market CBD oil make a wide variety of claims about it. However, scientists and doctors emphasize that the research on CBD is limited, and has been slowed in the United States by federal restrictions.