Mebhydrolin napadisylate (mehydraline) jẹ oogun apakokoro, ti a tun mọ ni antagonist olugba antihistamine ti iran akọkọ. Iṣẹ akọkọ rẹ ni lati ṣe idiwọ itusilẹ histamini ninu ara, nitorinaa dinku awọn aami aisan ti o fa nipasẹ awọn aati inira, gẹgẹbi sneezing, imu imu, oju omi, nyún, ati bẹbẹ lọ.