Updated report on comparative effectiveness of ACE inhibitors, ARBs, and direct renin inhibitors for patients with essential hypertension: much more data, little new information

J Gen Intern Med. 2012 Jun;27(6):716-29. doi: 10.1007/s11606-011-1938-8. Epub 2011 Dec 7.

Abstract

Objectives: A 2007 systematic review compared angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs) in patients with hypertension. Direct renin inhibitors (DRIs) have since been introduced, and significant new research has been published. We sought to update and expand the 2007 review.

Data sources: We searched MEDLINE and EMBASE (through December 2010) and selected other sources for relevant English-language trials.

Study eligibility criteria, participants, and interventions: We included studies that directly compared ACE inhibitors, ARBs, and/or DRIs in at least 20 total adults with essential hypertension; had at least 12 weeks of follow-up; and reported at least one outcome of interest. Ninety-seven (97) studies (36 new since 2007) directly comparing ACE inhibitors versus ARBs and three studies directly comparing DRIs to ACE inhibitor inhibitors or ARBs were included.

Study appraisal and synthesis methods: A standard protocol was used to extract data on study design, interventions, population characteristics, and outcomes; evaluate study quality; and summarize the evidence.

Results: In spite of substantial new evidence, none of the conclusions from the 2007 review changed. The level of evidence remains high for equivalence between ACE inhibitors and ARBs for blood pressure lowering and use as single antihypertensive agents, as well as for superiority of ARBs for short-term adverse events (primarily cough). However, the new evidence was insufficient on long-term cardiovascular outcomes, quality of life, progression of renal disease, medication adherence or persistence, rates of angioedema, and differences in key patient subgroups.

Limitations: Included studies were limited by follow-up duration, protocol heterogeneity, and infrequent reporting on patient subgroups.

Conclusions and implications of key findings: Evidence does not support a meaningful difference between ACE inhibitors and ARBs for any outcome except medication side effects. Few, if any, of the questions that were not answered in the 2007 report have been addressed by the 36 new studies. Future research in this area should consider areas of uncertainty and be prioritized accordingly.

Publication types

  • Case Reports
  • Comparative Study
  • Meta-Analysis
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.
  • Review
  • Systematic Review

MeSH terms

  • Angiotensin Receptor Antagonists / adverse effects
  • Angiotensin Receptor Antagonists / therapeutic use
  • Angiotensin-Converting Enzyme Inhibitors / adverse effects
  • Angiotensin-Converting Enzyme Inhibitors / therapeutic use
  • Antihypertensive Agents / adverse effects
  • Antihypertensive Agents / therapeutic use*
  • Cardiovascular Diseases / prevention & control
  • Evidence-Based Medicine
  • Female
  • Humans
  • Hypertension / drug therapy*
  • Medication Adherence
  • Middle Aged
  • Protease Inhibitors / adverse effects
  • Protease Inhibitors / therapeutic use
  • Renin / antagonists & inhibitors

Substances

  • Angiotensin Receptor Antagonists
  • Angiotensin-Converting Enzyme Inhibitors
  • Antihypertensive Agents
  • Protease Inhibitors
  • Renin