what is meant by drug?
Answers
A drug is any substance (other than food that provides nutritional support) that, when inhaled, injected, smoked, consumed, absorbed via a patch on the skin, or dissolved under the tongue causes a temporary physiological (and often psychological) change in the body.[2][3]
In pharmacology, a drug is a chemical substance of known structure, other than a nutrient of an essential dietary ingredient, which, when administered to a living organism, produces a biological effect.[4] A pharmaceutical drug, also called a medication or medicine, is a chemical substance used to treat, cure, prevent, or diagnose a disease or to promote well-being.[2] Traditionally drugs were obtained through extraction from medicinal plants, but more recently also by organic synthesis.[5] Pharmaceutical drugs may be used for a limited duration, or on a regular basis for chronic disorders.[6]