Another commonly used illicit drug throughout much of the world is cannabis. Cannabis has been separated into more than 60 components that have been identified. Among them, only tetrahydrocannabinol (THC) and tetrahydrocannabivarin (THCV) show hallucinogenic effects. There are two kinds of THC: Δ8-THC and Δ9-THC,depending on the position of the carbon bond. Of the two, Δ9-THC is responsible for more serious psychedelic effects.