This document discusses substance abuse and its causes, symptoms, and treatment approaches. It defines substance abuse as the consumption of alcohol or drugs in a way that harms one's health or functioning. Alcoholism is defined as a chronic disease caused by repeated drinking that injures one's health or social/economic life. Causes include stress relief, peer pressure, and psychological factors. Symptoms of alcoholism include blackouts, tremors, and loss of control. Treatment involves psychotherapy, behavior modification, and family therapy. Drug abuse is consuming drugs for non-medical reasons in excessive amounts, while drug addiction is a state of chronic intoxication from repeated drug use. Causes of drug addiction include peer pressure and emotional immaturity. Sympt