>>My, own thermostat, and those of friends with PD, are very wonky. We can sit around in 10 deg C (50 deg F) in short-sleeved shirts, in comfort, or (less often) resort to sweaters when its 25 deg C (77 deg F).<< Jim, interesting observation. I haven't noticed the shivering/sweating symptoms, but do find that, without a top coat, when driving by myself at temps. between 10 - 30 F, I have the heater off and the outside vent open, 30 degree F on up, the AC on. Needless to say, I suffocate when riding in my wifes' car, the heater, of which, is never off from Oct. to Mar. Joe Young (66/6) [log in to unmask]