Placebo effects can reduce symptoms of chemotherapy or radiation therapy.

“people who are told a given drug will help them with their cancer by reducing their symptoms of chemotherapy or radiation therapy all often experience reductions in the negative symptoms of chemotherapy or radiation therapy reduced pain reduced nausea and by consequence improved feelings of well-being compared to people who do not receive the placebo and who are not told hey this drug which in reality is a placebo is going to help you with your treatment it's going to make it less uncomfortable okay”