What is the difference between placebo and nocebo? To what extent do a patient’s beliefs about medical treatment influence its outcome? Placebo is the healing effect conferred by a fake medical treatment. Nocebo, on the other hand, is the opposite of placebo—whereby the negative beliefs about a medical treatment produce ill health effects. Here’s a look at the psychology behind placebo and nocebo.
What’s the Difference Between Placebo and Nocebo?










