Changes

: '''Placebos''' are known to have a positive effect on many illnesses. To ensure that a new potential [[medicine]] is not just a [[placebo]] some of the patients are given a [[placebo]] so the results can be compared with the potential [[medicine]]. If the results of the [[placebo]] and the potential [[medicine]] are the same, then the potential [[medicine]] had no effect.

: When administering [[placebo]] that patient is unaware whether they are being given the real potential [[medicine]] or not. This is known as a [[Blind Trial]]. Most trials of potential [[medicine]]s are [[Double Blind Trial]]s which means neither the doctor giving the potential [[medicine]] nor the patient receiving it will know if they've got the real one or not.