In drug testing, they don't test to see if a new drug is better than the one in use, they just test to see if it helps at all. They give one group the drug, and give a control group a placebo, usually a sugar pill. In testing for psychoactive drugs, the control group knows which they are if they don't feel a bit different, so a few testers don't use sugar pills, choosing something that produces mental effects with no known therapeutic value. In those tests, the drug shows no advantage - either one is just something that convinces the patient that this is a good time to try a new behaviour, due to the things people say about it. However, if you have learned how to cope with your chemistry altered, there is a new learning on how to do it naturally.