title: I've been using antihistamine tablets for my allergies, but my pharmacist told me that an antihistamine nose spray is now available. Should I switch to the spray?
mesh_terms: D000281:Administration, Intranasal; D006634:Histamine H1 Antagonists / Q000008:administration & dosage*; D006801:Humans; D010793:Phthalazines / Q000008:administration & dosage*
chemical_list: D006634:Histamine H1 Antagonists; D010793:Phthalazines; C020976:azelastine