The following quotes are from http://www.gamblinghelper.com/gambling_ ... _addiction
Recently scientists have classified gambling addiction as a neurobiological disorder, a chemical dependency of the brain similar to those addicted to drugs such as cocaine, crack cocaine, heroin, and alcohol. According to these scientists, gambling is a drug because its psychoactive effects are similar to tangible drugs. For example, under an MRI (Magnetic Resonance Imaging) scan, the affected areas of the ...