You all are a wonderful group and I thank each of you for your thoughtful and very helpful responses. Dex stayed overnight in the hospital and they did bocoo tests on him to see if he had any kind of heart problem. All came out negative - so it had to be Parkinson's and/or medications. I have taken to heart all your warnings about making sure his medications are correct and taken on time. He has also read your responses and is willing for me to doublecheck his pills for the day. I like the idea of keeping a diary (Thanks Callie!) so we are going to do that also. Will let you know if it happens again. Rosemary in this with Dex75/6