Successful treatment is possible by replacing the missing dopamine substance with medical therapy in the early stages of Parkinson's disease. In advanced stages, and/or in cases where medical treatment is insufficient, it is possible to restore the patients to their initial stages by performing Deep Brain Stimulation (DBS).However, even if the patients appear to be living everyday life, it does not seem possible to cure the disease completely. It happens since the missing substance in the brain cannot be replaced, similar to the insulin deficiency in diabetes.