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Many patients (as many as one third) who take angiotensin-converting–enzyme (ACE) inhibitors develop coughs. However, an enhanced cough reflex might lower risk for pneumonia. In this meta-analysis of 37 studies (18 randomized trials, 11 cohort studies, and 8 case-control studies), investigators evaluated the association between use of ACE inhibitors or angiotensin-receptor blockers (ARBs) and risk for pneumonia.
Overall, use of ACE inhibitors was associated with a significant 34% lower risk for pneumonia compared with no use of ACE inhibitors and a significant 30% lower risk for pneumonia compared with ARB use. Subgroup analyses of patients with stroke or heart failure yielded similar results. Finally, use of ACE inhibitors compared with no …