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Drug
A drug is any chemical substance that when consumed causes a change in an organism's physiology, including its psychology, if applicable. Drugs are typically distinguished from food and other substances that provide nutritional support. Wikipedia
A drug is any chemical substance that when consumed causes a change in an organism's physiology, including its psychology, if applicable.
NIDA's mission is to advance science on the causes and consequences of drug use and addiction and to apply that knowledge to improve individual and public ...