Definition of Placebo

placebo

An inert substance that has no biological, chemical, or other action within the body, taken with the intent of producing a therapeutic effect.

The placebo effect refers to the sense of improvement of symptoms an individual may experience when taking or using a product that has no active ingredients.

Researchers often use placebo products when testing new drugs, particularly medications such as pain relievers (analgesic medications), in which the assessment of effectiveness has a subjective component.

See also INVESTIGATIONAL NEW DRUG (IND); MINDBODY CONNECTION.

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