JOURNAL ARTICLE
REVIEW

The effect of combination treatment with aliskiren and blockers of the renin-angiotensin system on hyperkalaemia and acute kidney injury: systematic review and meta-analysis

Ziv Harel, Cameron Gilbert, Ron Wald, Chaim Bell, Jeff Perl, David Juurlink, Joseph Beyene, Prakesh S Shah
BMJ: British Medical Journal 2012 January 9, 344: e42
22232539

OBJECTIVE: To examine the safety of using aliskiren combined with agents used to block the renin-angiotensin system.

DESIGN: Systematic review and meta-analysis of randomised controlled trials.

DATA SOURCES: Medline, Embase, the Cochrane Library, and two trial registries, published up to 7 May 2011.

STUDY SELECTION: Published and unpublished randomised controlled trials that compared combined treatment using aliskiren and angiotensin converting enzyme inhibitors or angiotensin receptor blockers with monotherapy using these agents for at least four weeks and that provided numerical data on the adverse event outcomes of hyperkalaemia and acute kidney injury. A random effects model was used to calculate pooled risk ratios and 95% confidence intervals for these outcomes.

RESULTS: 10 randomised controlled studies (4814 participants) were included in the analysis. Combination therapy with aliskiren and angiotensin converting enzyme inhibitors or angiotensin receptor blockers significantly increased the risk of hyperkalaemia compared with monotherapy using angiotensin converting enzymes or angiotensin receptor blockers (relative risk 1.58, 95% confidence interval 1.24 to 2.02) or aliskiren alone (1.67, 1.01 to 2.79). The risk of acute kidney injury did not differ significantly between the combined therapy and monotherapy groups (1.14, 0.68 to 1.89).

CONCLUSION: Use of aliskerin in combination with angiotensin converting enzyme inhibitors or angiotensin receptor blockers is associated with an increased risk for hyperkalaemia. The combined use of these agents warrants careful monitoring of serum potassium levels.

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