Medical Definition of azelastine
: an antihistamine drug administered in the form of its hydrochloride C22H24ClN3O·HCl as a nasal spray to treat rhinitis and as eye drops to treat itching associated with allergic conjunctivitis Azelastine may cause a transient bitter or metallic taste even when administered intranasally.—F. Estelle R. Simons and Keith J. Simons, The New England Journal of Medicine, 9 June 1994
Seen and Heard
What made you want to look up azelastine? Please tell us where you read or heard it (including the quote, if possible).