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Placebos in clinical practice and research

P P De Deyn1, R D'Hooge

  • 1Department of Neurology, Middelheim General Hospital, Antwerp, Belgium.

Journal of Medical Ethics
|June 1, 1996
PubMed
Summary

Placebo use in clinical research is essential due to unpredictable placebo effects. Ethical guidelines and informed consent are crucial for responsible placebo-controlled trials, especially when no adequate therapies exist.

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Area of Science:

  • Medical Ethics
  • Clinical Research Methodology
  • Neuropsychiatry

Background:

  • The placebo effect encompasses diverse non-specific effects from treatments and patient-therapist interactions.
  • Its unpredictability necessitates placebo-controlled designs in most clinical trials.
  • Therapeutic and diagnostic placebo use is ethically permissible only in limited, well-defined circumstances.

Purpose of the Study:

  • To explore the ethical considerations of placebo use in clinical research.
  • To address the conflict between Hippocratic and scientific obligations of therapists.
  • To illustrate how objective data and guidelines can resolve ethical dilemmas in placebo-controlled trials.

Main Methods:

  • Review of current applications of placebo in clinical research.
  • Analysis of ethical principles governing placebo use.
  • Case examples from neuropsychiatry to illustrate ethical problem-solving.
  • Discussion of guidelines for ethically sound placebo-controlled studies.

Main Results:

  • Placebo control is often an ethical obligation in research, particularly when no adequate therapies exist or active treatments have severe side effects.
  • Ethical use requires minimizing treatment duration and risks to participants.
  • Informed consent and adequate participant information are paramount.

Conclusions:

  • Objective scientific data and clear guidelines can resolve ethical dilemmas associated with placebo use.
  • Placebo-controlled trials, when conducted ethically, are vital for advancing medical knowledge.
  • Adherence to strict ethical provisos ensures participant safety and research integrity.
Keywords:
Analytical ApproachBiomedical and Behavioral ResearchMental Health Therapies

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