Is anyone on the list have or take care of a Parkinson's patient for whom the sinemet no longer works for them? John has had Parkinson's for 20 years now and his window of functionality is not about an hour and a half. The doctors change the pills around, add some; take away some; but in the end it is the same. He had a paladotomy 3 years ago and one side and that did help considerably but not recommended for both sides. Has anyone tried or heard about implantation - pig or stem tissue? and success rate? Am very interested Carol [log in to unmask]