ʻO ka Mebhydrolin napadisylate (mehydraline) he lāʻau antihistamine, ʻike ʻia hoʻi he antihistamine H1 receptor antagonist mua. ʻO kāna hana nui ka pale ʻana i ka hoʻokuʻu ʻana o ka histamine i loko o ke kino, a laila e hōʻemi i nā hōʻailona i hoʻokumu ʻia e nā hopena maʻi, e like me ka sneezing, runny nose, watery eyes, itching, etc.