CBD is one of the many compounds, known as cannabinoids, that are found in the cannabis plant.Marijuana is made of both CBD and THC( tetrahydrocannabinol ). THC is what gives the user the high . CBD is not psychoactive . CBD oil can relieve pain,reduce anxiety and depression . CBD may also be able to treat insomnia and PTSD.CBD apparently has similar effects to anti depressants . CBD is being studied for its affect on cancer related symptoms ( nausea, pain etc). It also may help to lower blood pressure . As with anything please consult your doctor, CBD can react with other medication.