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What makes placebo-controlled trials unethical?

Franklin G Miller1, Howard Brody

  • 1National Institutes of Health.

The American Journal of Bioethics : AJOB
|August 22, 2002
PubMed
Summary

Placebo-controlled trials are ethically permissible even when effective treatments exist, challenging the principle of clinical equipoise. Methodological rigor and participant safety justify their use in clinical research.

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Area of Science:

  • Clinical ethics
  • Medical research methodology

Background:

  • The prevailing ethical stance prohibits placebo-controlled trials if an effective treatment is available.
  • This position, based on clinical equipoise, argues such trials violate physician obligations and lack merit.

Purpose of the Study:

  • To challenge the ethical prohibition of placebo-controlled trials when effective treatments exist.
  • To re-evaluate the application of clinical equipoise in the context of clinical trials.

Main Methods:

  • Critically analyze the ethical arguments against placebo-controlled trials.
  • Examine the principle of clinical equipoise and its limitations in trial design.
  • Assess the methodological considerations of active-controlled versus placebo-controlled trials.

Main Results:

  • The arguments against placebo-controlled trials based on clinical equipoise are flawed.
  • Clinical equipoise does not adequately distinguish between clinical trials and clinical treatment.
  • Active-controlled trials have inherent methodological limitations that placebo controls can address.

Conclusions:

  • Placebo-controlled trials can be ethically justified.
  • Justification hinges on sound methodological design and ensuring participant safety.
  • The ethical permissibility depends on a nuanced understanding of trial context and risk.
Keywords:
Analytical ApproachBiomedical and Behavioral Research

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