nocebo effect

noun

Definition of nocebo effect

:the development of adverse side effects or worsening in the condition of a patient that occurs in response to medical treatment but cannot be considered due to the specific treatment used
  • With a nocebo effect, if test subjects believe there may be side effects, they often experience them. Again, expectations shape reality.
  • —Sanjay Gupta

Recent Examples of nocebo effect from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nocebo effect.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of nocebo effect

1969


Medical Dictionary

nocebo effect

noun

medical Definition of nocebo effect

:the development of adverse side effects or worsening in the condition of a patient that occurs in response to medical treatment but cannot be considered due to the specific treatment used
  • With a nocebo effect, if test subjects believe there may be side effects, they often experience them. Again, expectations shape reality.
  • —Sanjay Gupta, Chasing Life: New Discoveries In The Search For Immortality …2007
  • The placebo effect has an evil twin: the nocebo effect, in which dummy pills and negative expectations can produce harmful effects.
  • —Helen PilcherNew Scientist16 May 2009

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