A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support.

What is drug explain?

Drugs are substances that change a person's mental or physical state. They can affect the way your brain works, how you feel and behave, your understanding and your senses. This makes them unpredictable and dangerous, especially for young people. The effects of drugs are different for each person and drug.

What is a drug easy definition?

A drug is a chemical which is given to people in order to treat or prevent an illness or disease. ... Drugs are substances that some people take because of their pleasant effects, but which are usually illegal.