This document provides an overview of drugs, including their history and types. It discusses how drugs were first discovered and passed down through generations. It defines drugs as chemicals that affect thinking, feelings and behavior. Many drugs come from natural sources like plants, while others are man-made in labs. The document then covers various illegal and legal drugs like ecstasy, opium, cocaine, LSD, marijuana, and others; and describes the harm they can cause to organs like the heart, lungs and brain. It lists reasons why people use drugs and ways to stop using drugs, such as rehab or counseling. Finally, it shares a story about a boy named John who struggled with drug addiction for over 20 years.