Sinemet, mirapex, requip, PD medication

Does anyone have any first hand experiance with this medication? What kind of effects does it have on a person that does not have PD. I know of the side effects include severe hallucinations to people who need the medication to treat PD, but what about those who dont need it. I'm not really sure what the side effects of a dopamine agonist would be on people who have regular levels in their brain.