(drug) Any substance (other than food) that is used to prevent, diagnose, treat, or relieve symptoms of a disease or abnormal condition. Drugs can also affect how the brain and the rest of the body work and cause changes in mood, awareness, thoughts, feelings, or behavior.
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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
National Drug Code Directory Search. Find information about finished drug products, unfinished drugs, and compounded drug products. Orange Book.
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 ...