As of 2015, CBD oil, a kind of medical marijuana preparation that contains only cannabidiol, is still under investigation by the Food and Drug Administration for safety, according to the East Bay Express. Cannabidiol lacks the characteristic high of marijuana, and it can be poisonous if taken intravenously.
CBD oil has the same federal classification as marijuana and is a Schedule I drug, notes TruthOnPot.com. It has fewer side effects than THC, another component of marijuana, but its full effects or safety are unknown. In addition to being poisonous when taken as an IV, skin contact with the drug is toxic.
Manufacturers market the drug as an oral medication for a variety of conditions. While there is evidence for its usefulness in epilepsy and schizophrenia, the FDA has not approved it. Although manufacturers claim that CBD oil kills cancer cells and treats other various illnesses, research does not yet confirm such statements, according to the East Bay Express.