title: Understanding urticaria.
mesh_terms: D000929:Antidepressive Agents, Tricyclic / Q000627:therapeutic use*; D006635:Histamine H2 Antagonists / Q000627:therapeutic use*; D006801:Humans; D014581:Urticaria / Q000188:drug therapy*
chemical_list: D000929:Antidepressive Agents, Tricyclic; D006635:Histamine H2 Antagonists