Like what graduate school prefers a Bachelor's to a PharmD? The PharmD is considered a both a "terminal" degree and a first degree depending on the institution and is classified as such for international equivalence by US Department of Education (PharmD is considered both a first and second cycle degree for the purposes of equivalence and I-9 issues). Unless you're really far out of your major for graduate school (and I mean something like MFA Instrument Performance or M. Div. Theology) where the undergraduate has a component that really is not equivalent to the background pharmacy training), for the normal Public Health, Social Science (Econ, Sociology, Demography), and even basic science like Computer Science or Mathematics, so long as you meet the subject prerequisites for graduate school and do ok on the GRE, they really don't care about the undergraduate major. (There is an implied preference for math majors in demography and economics, at least where College Park and GWU are concerned).
If the advice came from the prospective graduate school, I doubt you were given good advice from either the department level or graduate school admissions if that was what you were told (again unless you are going for fine arts or some sort of technical performance major which are very specialized in the type of student admitted).