There is no true clinical evidence to support CBD as a sleep aid. CBD oil itself should not make a person drowsy, CBD may diminish the anxiety that can inhibit sleep and could be effective as a sleep aid for people who need to calm down and relax their mind. Although, there are other studies that show drowsiness is a common side effect of CBD products. Also it’s worth mentioning that it depends on other factors like reliability of the purity and dosage of CBD in products.