This invention discloses new uses and treatments involving cabergoline, pramipexole and new combinations of cabergoline plus pramipexole used to treat patients. Here we disclose the use of cabergoline or pramipexole to treat PSP and MSA. Also disclosed is a combination treatment of cabergoline and pramipexole provided concurrently to a patient in need thereof for the treatment of various central nervous system diseases and in particular for the treatment of Parkinson's Disease (PD), but also for PSP and MSA.