I understand,it fools the mind,believing the actual drug has been taken,but as mentioned,other factors come into play.

The placebo effect can be more complicated than that: [sciencebasedmedicine.org].

You say "I've got a headache", and I give you some aspirin. You take them and feel better. This happens again but instead of aspirin I give you a fake pill (a plicibo) that I say is aspirin. You take it and feel better. That's the placibo effect. Why does that work? It's not certain. Does it work always? No it does not. But if I was conducting a study of how well aspirin works I would want to measure taking aspirin for headaches with a group of people ( a population study) and compare the results against another group that just got a plicibo (a control group). Telling both groups that they all were taking aspirin would make it a " blind study". The difference in results between the two groups would indicate the effectiveness of using aspirin to cure headaches.