An organization that establishes standards for drugs approved by the U.S. Food and Drug Administration (FDA) for their labeled use.

The quantity of a drug to be taken at one time or the stated amount of drug per unit of distribution (e.g., 0.5 mg per milliliter of solution

An immediate hypersensitivity reaction to a foreign protein or other specific substance.

Refers to administration of a drug by injection.

A group of liquids that easily evaporate and, when inhaled, produce general anesthesia through interaction with the CNS.

The time required for one-half of a drug to be cleared from the body.

A state of balance in physiological functions. 

The biochemical and physiological effects of drugs and their mechanisms of action in the body.

The biochemical and physiological effects of drugs and their mechanisms of action in the body.

A drug that reduces or blocks sensation or induces unconsciousness.