Marijuana addiction, also known as cannabis use disorder, is a condition in which a person becomes physically and psychologically dependent on the active ingredient in marijuana, known as THC. Regular use of marijuana can lead to changes in brain chemistry and the development of dependence. Treatment options for marijuana addiction may include behavioral therapies, such as cognitive-behavioral therapy, and support groups. Prevention strategies include avoiding marijuana use altogether, seeking professional help for underlying psychological or relationship issues, and developing healthy coping mechanisms.