Why is Addiction a Mental Disorder Addiction, Dual Diagnosis, RecoveryBy Beaches RecoveryMay 19, 2019Addiction impacts your physical, emotional and spiritual health, but why is addiction a mental disorder? To better understand why is addiction a mental disorder, it is important to understand how addiction to drugs and alcohol impacts and changes your brain. Drugs and alcohol create feelings of happiness, contentedness, and euphoria by increasing the number of…