This document discusses different types of drugs, including legal and illegal drugs. It defines hard drugs as those that cause addiction and physical or psychological dependence, such as cocaine, opioids, alcohol, and amphetamines. Soft drugs are said to cause only mild or single dependence and include cannabis and caffeine. The document notes teens are at higher risk of drug problems if they have a family history of substance abuse, are depressed, have low self-esteem, feel like outsiders, or come from families where drug use is present. Substance abuse can lead to health issues like hepatitis, cirrhosis, and cardiovascular or psychological disorders, as well as social problems involving assaults and conflicts.