Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/16/2025

Hypertension Management with Perindopril and Second Agent

Rationale for Combination Therapy

  • Most hypertensive patients require more than one drug to achieve blood pressure control, with combination therapy being necessary for the majority of patients 3
  • When adding a second agent to an ACE inhibitor like perindopril, the most effective and complementary combinations include a calcium channel blocker or a thiazide diuretic 3, 1
  • The British Hypertension Society recommends combining drugs with complementary mechanisms of action - specifically an ACE inhibitor with either a calcium channel blocker or a diuretic 2

Preferred Second Agent: Calcium Channel Blocker

  • A calcium channel blocker is the preferred second agent to add to perindopril based on the most recent European Society of Cardiology guidelines 1, 4
  • The American College of Cardiology and European Society of Cardiology recommend a calcium channel blocker, particularly amlodipine, as the preferred second agent to add to perindopril 1, 4

Alternative Second Agent: Thiazide Diuretic

  • If a calcium channel blocker is not tolerated or contraindicated, a thiazide diuretic is an effective alternative second agent 3, 5
  • The European Society of Cardiology and American Heart Association suggest that perindopril combined with a thiazide diuretic has shown synergistic effects in blood pressure reduction 3

Special Populations and Considerations

  • In black patients, initial combination therapy should include a calcium channel blocker with either a thiazide diuretic or a RAS blocker 1, 4
  • For patients with resistant hypertension, adding spironolactone as a fourth agent should be considered if blood pressure remains uncontrolled on a three-drug regimen 1, 6

Common Pitfalls to Avoid

  • Avoid combining two RAS blockers, as this increases adverse effects without additional benefit, according to the European Society of Cardiology 7
  • Be cautious when combining beta-blockers with diuretics in patients at high risk for diabetes, as recommended by the British Hypertension Society 2
  • Monitor for orthostatic hypotension when using multiple antihypertensive agents, especially in elderly patients, as advised by the British Journal of Cancer and European Society of Cardiology 6, 7