i took the PCAT before I took the DAt and applied to dental school.
it never once came up through the entire admissions/interview process and i interviewed at 5 schools, then turned down another interview. relax, no one cares.
AADSAS does ask you questions like "are you applying to medical school?" (and i believe applying to both d and med school at the same time is stigmatized and frowned upon) but nothing about taking the pcat or mcat or gre. it won't even come up.