After 10 weeks, subjects taking sham pills said their pain decreased an average of 1.50 points on the 10-point scale. After 8 weeks, those receiving fake acupuncture reported a drop of 2.64 points. In other words, not receiving acupuncture reduces pain more than not taking drugs.
Kaptchuk says that the rituals of medicine explain the difference: Performing acupuncture is more elaborate than prescribing medicine. Other rituals that may make patients feel better include “white coats, and stethoscopes that you don’t necessarily use, pictures on the wall, the way you reassure a patient, and the secretaries that sign you in.” Careful manipulation of such rituals could make all types of treatment more effective, Kaptchuk suggests.
(Thanks to Jill for the link!)