Mebhydrolin napadisylate (mehydraline) bụ ọgwụ antihistamine, nke a makwaara dị ka ọgbọ mbụ antihistamine H1 antagonist. Isi ọrụ ya bụ igbochi mwepụta nke histamine n'ime ahụ, wee si otú ahụ belata mgbaàmà nke mmeghachi ahụ nfụkasị ahụ na-akpata, dị ka imi, imi imi, anya mmiri, itching, wdg.