Which preposition to use with oppugned

to Occurrences 1%

In such esteem it continued for many ages, till at length Mesue and some other Arabians began to reject and reprehend it, upon whose authority for many following lustres, it was much debased and quite out of request, held to be poison and no medicine; and is still oppugned to this day by Crato and some junior physicians.

Which preposition to use with  oppugned