This document discusses drug addiction, including its causes, effects, and prevention. It defines drug addiction as a disease that affects the brain and leads to an inability to control drug use. Common causes include lack of social connections, poor school or work performance, and peer pressure. Effects can include lung disease, brain damage, and mental health issues. The document lists cannabis and cocaine as examples of commonly abused drugs and their usage. Finally, it suggests ways to prevent addiction, such as developing healthy coping mechanisms, avoiding peer pressure, and strengthening family ties.