OTCs vs. Rx for allergic rhinitis.
D000281:Administration, Intranasal; D004205:Cromolyn Sodium / Q000627:therapeutic use; D006634:Histamine H1 Antagonists / Q000627:therapeutic use; D006801:Humans; D014663:Nasal Decongestants / Q000627:therapeutic use; D004366:Nonprescription Drugs; D012221:Rhinitis, Allergic, Perennial / Q000188:drug therapy*; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D013256:Steroids / Q000008:administration & dosage / Q000627:therapeutic use
D006634:Histamine H1 Antagonists; D014663:Nasal Decongestants; D004366:Nonprescription Drugs; D013256:Steroids; D004205:Cromolyn Sodium