I have not tried the nicotine therapy for treatment of PD. However, I can tell you that my symptoms came out of hiding when I quit smoking. Dr. said the smoking had masked the symptoms....looking back, I know the symptoms were there for a few years....just not as pronounced as they were after I finally quit. I had smoked off and on since college....25 -26 years.....I hesitate in trying the patch or gum just because, now that I have quit, I certainly do not want to take that habit up again.....even if it means contending with PD. Does anyone know if use of the patch or gum could cause a person to want start back smoking? Thanks, Sharon