Mebhydrolin napadisylate (mehydraline) ni umuti wa antihistamine, uzwi kandi ku izina rya antihistamine H1 reseptor antagonist. Igikorwa cyacyo nyamukuru ni ukubuza irekurwa rya histamine mu mubiri, bityo bikagabanya ibimenyetso biterwa na allergie reaction, nko kuniha, izuru ritemba, amaso yuzuye amazi, guhinda, nibindi.