Researchers say dopamine agonists should get black-box warnings
                                
                                
                                    (Newser) -
                                    Parkinson's drugs are known for a range of side effects, including hallucinations, psychosis, and extreme drowsiness. But researchers say there's also a clear link between the use of some of these drugs and impulse control issues that result in hypersexuality, compulsive gambling, and uncontrollable spending, reports  LiveScience . Looking...