It is the miracle cure of the ages. Read all about it at Placebo Nation: Just Believe. You might see an ad first, but just close it. Here is an exerpt:
"Ariely's curiosity about the power of expectation—which he explores in his new book, "Predictably Irrational"—inspired a study of what affects those expectations. He and colleagues gave 82 volunteers a brochure explaining that they would be testing a new pain drug called Validone that worked like codeine, but faster. (It was actually a placebo.) Each then received a series of electrical shocks on their wrists, rating them from "no pain at all" to "the worst pain imaginable." Each then took a "Validone." Half were told it cost $2.50, the other half that it cost a dime. They then received shocks again. Of those who got the $2.50 pill, 85 percent felt less pain from the same voltage than before taking it; 61 percent of those taking the cheap pill felt less pain, the scientists reported last week in The Journal of the American Medical Association. The pricier the drug, the higher the expectation of efficacy, and the stronger the placebo effect."