I-Mebhydrolin napadisylate (i-mehydraline) iyiyobisi ye-antihistamine, eyaziwa ngokuba yisizukulwana sokuqala se-antihistamine H1 receptor antagonist. Umsebenzi wayo ophambili kukuthintela ukukhutshwa kwe-histamine emzimbeni, ngaloo ndlela kuncitshiswa iimpawu ezibangelwa kukwaliwa, njengokuthimla, impumlo ebalekayo, amehlo anamanzi, ukurhawuzelelwa, njl.