My Mom's friend that had to stop sinemet cold turkey due to allergy has emerged much better finally. They were sure she was going to die at the time I first posted. She did get very ill but is now functioning fairly well with no sinemet and feels better than she did before. I'm trying to get details on WHAT exactly she is taking now. Her age and health make it rather difficult to quiz her filtered through my mom. The great news is that she is sinemet free after many years and feeling better than she has in years. Bad news is it darn near killed her to quit cold turkey, I can't imagine.