Sleeping pills don't lull you to sleep but their placebo (dummy) effect does which is psychological reveals a new study. A placebo is a dummy treatment for a disease intended to deceive the recipient into believing that he is receiving an actual pill. It may have a perceived or actual improvement in one's condition commonly called the placebo effect.Researchers from the UK and the US have cast doubt over the effectiveness of drugs for insomniacs. The placebo (dummy) effect produced around 50 percent of the benefits with the active ingredient Z-drugs in sleeping pills making up the rest the British Medical