Article date: December 2011
Angiotensin II receptor antagonists (ARBs) are an important option in the treatment of hypertension.
In 2010, a meta-analysis of randomised controlled trials by Sipahi and colleagues reported a small but significant association between use of ARBs and new cancer occurrence, particularly lung cancer. This study had several methodological limitations and it sparked further investigation of the issue by several other independent investigators.
Since then, the results of three further meta-analyses have become available. These analyses include most of the available data from randomised controlled trials and, although they were conducted differently, all have very similar findings. Importantly, none suggest an association with cancer.
The findings from the meta-analyses of randomised controlled trials are largely supported by the findings of two large observational studies. Although some subgroup analyses and individual trials showed a modest increase or decrease in risk, these findings were inconsistent across trials or analyses.
The European Medicines Agency’s Committee for Medicinal Products for Human Use (CHMP) has reviewed a possible link between the use of ARBs and the occurrence of new cancers and concluded that the evidence does not support any increased risk of cancer in patients who use these medicines. Rather than supporting the original concerns raised for ARBs, the totality of the available evidence from well conducted analyses is reassuring and does not support any increased risk of cancer.
European Medicines Agency press release
BNF section 2.5.5 Drugs affecting the renin-angiotensin system
US Food and Drug Administration drug safety announcement
Article citation: Drug Safety Update Vol 5 Issue 5, Dec 2011: H1.
Published 12 December 2011