Antihistamines.
D000328:Adult; D002648:Child; D002675:Child, Preschool; D006634:Histamine H1 Antagonists / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D006967:Hypersensitivity / Q000188:drug therapy; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy
D006634:Histamine H1 Antagonists