Any dummy medication or treatment. Although placebos originally were medicinal preparations having no specific pharmacological activity against a targeted condition, the concept has been extended to include treatments or procedures, especially those administered to control groups in clinical trials in order to provide baseline measurements for the experimental protocol.
    

concept

The art of curing diseases by expectation : with remarks on a supposed great case of apoplectick fits. Also most useful observations on coughs, consumptions, stone, dropsies, fevers, and smallpox; with a confutation of dispensatories, and other various discourses in physick / By Gidean Harvey.

Placebos

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Catalogue

Placebo : historie, biologi og effekt / Lars Ole Andersen [and others].

Die Medizin ist eine soziale Wissenschaft ... / Karl Sablik.

Placebo : the belief effect / Dylan Evans.

Follies and fallacies in medicine / Petr Skrabanek, James McCormick.

Medicine's humble humbug : four periods in the understanding of the placebo / by Suzanne White.