I have very similar symptoms to Dogma, but it can't be drugs because I don't take ANY as yet. It must be the PD. The ENT specialist called it "Cacosmia" (smelling unpleasant odours), " Anosmia" (smelling no odour). Fancy names, but he had no idea of the cause. That was 13 yrs ago, and I was diagnosed with PD in Feb, so that was the cause. I have heard since that this quite common. Kind regards, Ladybird.