Cannabinoids help heal people with pain, epilepsy, cancers, and many other disorders in humans, including mammals. The discovery that cannabinoids can help the hippocampus generate new neurons throughout the lifespan of mammals, can change the way people think about drug addiction. Chronic use of opiates, alcohol, nicotine, and cocaine have been reported to suppress hippocampal neurogenesis, cannabis can play a role in neurogenesis, today in the treatment of drug addiction cannabis is usually never used and discouraged.