Active pharmaceutical ingredient

From WikiMD's Wellness Encyclopedia

(AK-tiv FAR-muh-SOO-tih-kul in-GREE-dee-ent) The main ingredient in a medicine that causes the desired effect of the medicine. Some medicines contain more than one active pharmaceutical ingredient that act in different ways in the body. Also called API, drug substance, and pharmacologic substance.

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Contributors: Prab R. Tumpati, MD