placebo [placebos](a dummy medicine containing no active ingredients; an inert treatment) noun [UK: plə.ˈsiːb.əʊ] [US: plə.ˈsiːb.oʊ]It's only a placebo. = È solo un placebo.
effetto placebonoun {m}
placebo effect(tendency for a substance to exhibit results due to belief of the recipient) noun