what are drugs

Drugs are substances that change a person's mental or physical state. They can affect the way the brain works, how a person feels and behaves, their understanding, and their senses. Drugs can be legal, such as alcohol, caffeine, and nicotine, or illegal, such as heroin, cocaine, and marijuana. They can come from different sources, including plants, processed plant products, and synthetic chemicals. Some drugs are used for medical purposes, while others are sought out for recreational, non-medical use due to their psychoactive effects and may also be illegal. Recreational drugs fall into four main classifications: depressants, stimulants, hallucinogens, and opioids