Placebo--the universal drug.
D004723:Endorphins / Q000502:physiology; D004992:Ethics, Medical; D006801:Humans; D010146:Pain / Q000188:drug therapy; D010817:Physician-Patient Relations; D010919:Placebos / Q000494:pharmacology / Q000627:therapeutic use*; D013312:Stress, Physiological / Q000188:drug therapy
D004723:Endorphins; D010919:Placebos