CBD is said to promote relaxation and a sense of ease. Though its only federally approved use is in a drug called Epidiolex, an anti-epileptic medicine for children, users of non-pharmaceutical CBD attribute dozens of purported health benefits to the substance. As a folk cure, the hemp derivative is used to treat everything from anxiety to psoriasis. There have been no clinical trials to prove CBD -- also known as cannabidiol -- is effective for anything other than rare forms of epilepsy.