Mebhydrolin napadisylate (mehydraline) yog ib qho tshuaj antihistamine, tseem hu ua thawj tiam antihistamine H1 receptor antagonist. Nws lub luag haujlwm tseem ceeb yog inhibit qhov kev tso tawm ntawm histamine hauv lub cev, yog li txo cov tsos mob tshwm sim los ntawm kev tsis haum tshuaj, xws li txham, hnoos, qhov muag dej, khaus, thiab lwm yam.