To the Editor: Acid suppression therapy is associated with an increased risk of community-acquired pneumonia, and Dr Herzig and colleagues1 reported that these drugs also increase the odds of HAP by 30%. Unlike community-acquired pneumonia, this association was only apparent with proton-pump inhibitors, although it was acknowledged that the study might have been underpowered to detect a smaller effect with histamine2 receptor antagonists. Two mechanisms were suggested for the increase in pneumonia: gastric overgrowth and aspiration of bacteria, and impaired leukocyte function.
Wise MP, Saayman AG, Frost PJ. Acid-Suppressive Medication and Hospital-Acquired Pneumonia. JAMA. 2009;302(13):1415–1417. doi:https://doi.org/10.1001/jama.2009.1415
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