The meaning of the symbols of placebo seen in a dream.

Any dummy medical treatment or intervention. Originally, a medicinal preparation having no specific pharmacological activity against the person’s illness or complaint and given solely for the psychophysiological effects of the treatment. More recently, a dummy treatment administered to the control group in a controlled clinical trial in order that the specific and non-specific effects of the experimental treatment can be distinguished.... placebo

The placebo effect (usually but not necessarily beneficial) is attributable to the expectation that the regimen will have an effect, i.e. the effect is due to the power of suggestion.... placebo effect