title: Drug interactions: Who warns the patient.
mesh_terms: D018926:Anti-Allergic Agents / Q000494:pharmacology; D002170:Canada; D004345:Drug Industry; D004347:Drug Interactions; D006634:Histamine H1 Antagonists; D006801:Humans; D020407:Internet; D010353:Patient Education as Topic; D016593:Terfenadine / Q000494:pharmacology; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D018926:Anti-Allergic Agents; D006634:Histamine H1 Antagonists; D016593:Terfenadine