When blood pressure is difficult to control.
D000959:Antihypertensive Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D001794:Blood Pressure / Q000187:drug effects; D006801:Humans; D006973:Hypertension / Q000628:therapy*; D010349:Patient Compliance; D010353:Patient Education as Topic; D010808:Physical Examination
D000959:Antihypertensive Agents