Recurrent urticaria.
D000082:Acetaminophen / Q000627:therapeutic use; D006634:Histamine H1 Antagonists / Q000627:therapeutic use; D006801:Humans; D012008:Recurrence; D014581:Urticaria / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology
D006634:Histamine H1 Antagonists; D000082:Acetaminophen