According to the National Institutes of Health, people have used marijuana, or cannabis, to treat their ailments for at least 3,000 years. However, the Food and Drug Administration have not deemed marijuana safe or effective in the treatment of any medical condition, although cannabidiol, a substance that is present in marijuana, received approval in June 2018 as a treatment for some types of epilepsy.
Marijuana is being increasingly legalized in the U.S., but is it safe?
This tension, between a widespread belief that marijuana is an effective treatment for a wide assortment of ailments and a lack of scientific knowledge on its effects, has been somewhat exacerbated in recent times by a drive toward legalization.
Thirty Three states plus the District of Columbia have now made marijuana available for medical — and, in some states, recreational — purposes.