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The beneficial effect in a patient following a particular treatment that arises from the patient's expectations concerning the treatment rather than from the treatment itself.
(Medicine) med a positive therapeutic effect claimed by a patient after receiving a placebo believed by him to be an active drug. See control group
pla•ce′bo effect`(pləˈsi boʊ)
a reaction to a placebo manifested by a lessening of symptoms or the production of anticipated side effects.
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|Noun||1.||placebo effect - any effect that seems to be a consequence of administering a placebo; the change is usually beneficial and is assumed result from the person's faith in the treatment or preconceptions about what the experimental drug was supposed to do; pharmacologists were the first to talk about placebo effects but now the idea has been generalized to many situations having nothing to do with drugs|