Cannabis is the most commonly used illegal drug in the UK. It is a plant that contains hundreds of different compounds called cannabinoids. The main psychoactive cannabinoid is called THC (tetrahydrocannabinol). Other cannabinoids in the cannabis plant include CBD (cannabidiol), CBG (cannabigerol) and CBN (cannabinol). Plants are grown to contain different cannabinoid concentrations and can therefore produce different effects.
Cannabis plants have been a part of human history for thousands of years. The plant material can be used for rope and fibres in addition to being used for medicinal, psychoactive and religious purposes.
Cannabis should not be confused with "synthetic cannabinoids" also known as "Spice".