My personal experience with my PD symptoms is that caffeine exacerbates the dyskenitic movements caused by the standard PD drugs.(I take Sinemet(CR & 25/100), Permax, Eldepryl, & Artane). Since the onset of myPD, caffeine makes me jumpy, and hinders sleep far more than it did in my younger pre-PD life. Am 48, PD was diagnosed when I was 35. Stephen Holahan([log in to unmask])