Nasal sprays best for treating hay fever.
D000281:Administration, Intranasal; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D006634:Histamine H1 Antagonists / Q000008:administration & dosage; D006801:Humans; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*