Better than placebo?
Patients very often respond to a medical treatment or drug with an improvement of symptoms even if the "treatment" or "medication" has no possible effect on their condition. This is what is called the placebo effect. This effect varies with the type of illness, geographic or ethnic group, rituals involved in the "treatment" and many other factors. It is extremely important to keep in mind this effect when testing not only new but old medical drugs or techniques to make sure they are better than a placebo.