Researchers believe there are at least two active chemicals in cannabis that have medicinal applications: cannabidiol and tetrahydrocannabinol. Cannabidiol, also known as CBD, impacts the brain without a high, and tetrahydrocannabinol, also known as THC, has pain relieving properties. Tetrahydrocannabinol (THC) is the main psychoactive cannabinoid found in cannabis, and causes the sensation of getting “high” that’s often associated with marijuana. However, unlike THC, CBD is not psychoactive. #P