My father has had Parkinson for 11 years. He is taking the normal parkinson medications but is finding his off time is becoming longer and his on time is shorter. My cousin who is into herbal medicine suggested he take the herb called passion flower. He should put it under his tongue (it comes in a liquid form) prior to taking his medication. Apparently this herb helps the body to assimilate the medication quicker. Has anyone heard of this? Has anyone read any research on the use of passion flower? I would like to send the research to my Dad, if anyone has access or knows where it can be found. Thanks for your help. kpm