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In a placebo-controlled clinical trial any change in the control group is known as the placebo response, and the difference between this and the result of no treatment is the placebo effect. Some researchers now recommend comparing the experimental treatment with an existing treatment when possible, instead of a placebo.

Placebo is a British alternative rock band, formed in London in 1994 by vocalist–guitarist Brian Molko and bassist–guitarist Stefan Olsdal. Drummer Robert Schultzberg joined in late 1994, but left in 1996 shortly after the release of the band's eponymous debut album due to conflicts with Molko, and was replaced the same year by Steve Hewitt .

placebo placèbo s. m. [verbo lat., 1a pers. sing. del fut. indic. di placere «piacere» (quindi propr. «io piacerò»)], invar. – Preparazione farmaceutica a base di sostanza farmacologicamente inerte che viene somministrata soprattutto per gli effetti psicologici di autosuggestione che può avere sul paziente, oppure per eseguire confronti con medicamenti efficaci in una serie di ...