Cannabis contains two major neuroactive components. They are the psychoactive cannabinol THC (tetrahydrocannabinol) and the non-psychoactive cannabinol CBD (cannabidiol).
THC is the chemical compound responsible for the euphoric "high" associated with cannabis.
CBD has been studied extensively in both clinical and pre-clinical trials for its antioxidant, anti-inflammatory, anticonvulsant, anti-depressive, anti-psychotic, anti-humoral, and neuroprotective properties. It can be used for a wide range of conditions including seizures, chronic pain, PTSD, rheumatoid arthritis, anxiety, and more.