I believe a common non-motor symptom of PD is the loss of the sense of smell.

My sense of smell has proved to be opposite of this.
The Sinemet seems to bring about that strong, unpleasant smell, maybe like you were talking about.
I've found that I'm allergic to the Teva and Purepak brands of Sinemet. When taking the Mylan brand of Sinemet, I didn't have that one strong, unpleasant smell. But, my pharmacies can't get it anymore, of course.
Anyone else have this problem?