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When is it ethical to prescribe placebos?

The American Medical Association's Code of Ethics prohibits physicians from prescribing treatments that they consider to be placebos unless the patients know this and agree to take them anyway. But this policy is not clearly the best way to protect or benefit patients, concludes an The American Medical Association's Code of Ethics prohibits physicians from prescribing treatments that they consider to be placebos unless the patients know this and agree to take them anyway. But this policy is not clearly the best way to protect or benefit patients, concludes an article in the Hastings Center Report. A commentary by two AMA bioethicists responding to the article also appears in the journal.

Placebos are commonly understood to be inert treatments, such as sugar pills, that have no pharmacological effect, but the AMA defines placebos more narrowly, as therapies that a physician believes lack a specific pharmacological effect on the conditions being treated. The physician's belief may or may not align with the prevailing medical view of a treatment. "There are borderline and controversial cases, such as acupuncture and antidepressants, in which individual physicians might reasonably disagree with the medical community's consensus about whether a treatment is an active treatment or a placebo," writes Anne Barnhill, a philosopher and bioethicist who is studying social work at Columbia University.

The article cites a recent poll of American internists and rheumatologists that found that a significant number of them admit to giving patients placebos without disclosing the therapies as such. While some placebo use is patently unethical providing a treatment that "has no scientific basis and is dangerous, is calculated to deceive the patient by giving false hope, or which may cause the patient to delay in seeking proper care" other uses of placebos are widely seen as ethical, writes Barnhill.

Some placebos might offer medical benefit to patients with certain conditions, Barnhill notes, and the limited available data suggest that placebos are more effective when presented as active treatments. As a result, she adds, some bioethicists have argued that an undisclosed placebo is the best available treatment for some patients. "If the best available treatment is sometimes an undisclosed placebo," she writes, "then the AMA's policy prohibits physicians from offering the best available treatment in some cases."

In addition to failing to benefit patients, the AMA policy may not meet two of its other goals: protecting patients' autonomy and their trust in physicians. The rationale for requiring physicians to disclose their belief that a treatment is a placebo is that patients need this information in order to give informed consent about whether to take the treatment. Informed consent is essential to patient autonomy. But it is unknown whether patients find this information relevant to their decision-making, Barnhill says, because "there's little data on patients' attitudes toward placebos."

Because of this lack of data, Barnhill also argues that the AMA policy does not help protect patients' trust in physicians. "The AMA seems to assume that uncovering undisclosed placebo use reduces patients' trust in physicians. But this is not a given," she writes. "When they uncover undisclosed placebo use, patients might conclude that their physicians are untrustworthy liars or quacks, or that their physicians do not believe that they are truly sick or, that their physicians are open-minded, cutting-edge, and savvy about mind-body connections."

Barnhill recommends that the AMA consider revising its policy on placebo use. If the goal is to protect patients from harm, safeguard their trust, and respect their autonomy, she says, then rather than requiring physicians to disclose their personal belief about whether a treatment is a placebo, the policy might require physicians to report on the medical community's consensus on the treatment's status.

In the same issue of the Hastings Center Report is a commentary by Bette-Jane Crigger, director of Ethics Policy for the AMA and secretary of the Council on Ethical and Judicial Affairs, which wrote its ethical guidelines on placebo use, and Matthew K. Wynia, director of the AMA's Institute of Ethics. Regarding Barnhill's recommendation that the placebo policy be based on professional consensus, rather than individual doctor's judgment, they write, "We'd be tempted to agree but, as in so much of medicine, it isn't clear that a strong consensus is actually possible here." How, they ask, should doctors distinguish between so-called impure placebos medications that have a pharmacological effect on some illnesses but not necessarily for the ones for which they are being prescribed from off-label prescribing?

Crigger and Wynia emphasize that the overarching intent of AMA policy is to encourage physicians to be honest with their patients. "If there is professional disagreement on how or whether a particular pharmacologic agent works, then patients deserve to know that," they write. "If a doctor holds an outlier view, then his or her patients deserve to know that as well.


Contact: Michael Turton
845-424-4040 x242
The Hastings Center

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