In recent years, reports about Parkinson’s disease patients engaging in excessive gambling have cropped up in the news. Several lawsuits against pharmaceutical companies have been filed by individuals claiming that the drug treatments for Parkinson’s disease caused them to develop gambling disorders, sex addiction and other impulse control disorders. So, what is the connection between disordered gambling behavior and a degenerative disorder of the central nervous system that often impairs the sufferer's motor skills and speech? We asked Dr.