what is cbd cannabidiolCannabidiol (CBD) is a naturally occurring cannabinoid constituent of cannabis. It was discovered in 1940 and initially thought not to be pharmaceutically active.[1][6][7][8][9] It is one of at least 113 cannabinoids identified in hemp plants, accounting for up to 40% of the plant's extract.[8] As of 2018 in the United States, cannabidiol has not been approved by the Food and Drug Administration as a prescription drug for medical uses,[10] except for two rare forms of childhood epilepsy.[11]

Cannabidiol can be taken into the body in multiple different ways, including by inhalation of cannabis smoke or vapor, as an aerosol spray into the cheek, and by mouth. It may be supplied as an oil containing only CBD as the active ingredient (no added THC or terpenes), a full-plant CBD-dominant hemp extract oil, capsules, dried cannabis, or as a prescription liquid solution.[1][3]

Side effects of CBD include sleepiness, decreased appetite, diarrhea, fatigue, malaise, weakness, sleeping problems, and others.[3] It does not have intoxicating effects like those caused by THC, and may have an opposing effect on disordered thinking and anxiety produced by THC.[7][12][13] CBD has been found to interact with a variety of different biological targets, including cannabinoid receptors and other neurotransmitter receptors.[7][14] The mechanism of action of CBD in terms of its psychoactive and therapeutic effects is not fully clear.[7]