This document discusses mental health and the prevention of alcohol and drug abuse. It defines mental health as a state of well-being where individuals can cope with stress and be productive. Mental illness refers to problems like mood swings and sleep issues in stressful situations that are temporary in nature. The document also defines addiction as a chronic relapsing brain disease characterized by compulsive substance use despite harm. It is considered a chronic disease that cannot be cured but can be managed, and drug dependency creates a physical or psychological need for mood-altering substances. Psychoactive substances can alter mood, thoughts, perceptions, and behavior by changing biochemical processes in the body.