A lot of people are disturbed by the placebo effect because they believe that it undermines what actual medications are doing. Just believe more and your medication will work! Well, medications do have an effect. They do have to perform better than a placebo. Let's not get carried away with the concept. However, what the placebo effect does show us is that beliefs do have an affect, positively and negatively, on the body. And that is an amazing thing. It is literally proof of mind over matter. If you want proof that meditation will do Something that there is it. However, I am not sure that there had ever been a sustained study on placebo effect. That is to say, I am not sure it would have a lasting effect. But the effect is there. Our beliefs and moods do have an effect on us physically. And that is a lesson I think is good to remember. And maybe it does make a difference psychologically speaking that they always make sleeping pills blue. I don't know. There always is a psychological factor to how we perceive things like that... that is why they do them that way.