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Cotrimoxazole is associated with sudden death in older patients receiving inhibitors of renin–angiotensin system
  1. Raya E Kheirbek1,
  2. Nawar Shara2
  1. 1VA Medical Center, Washington DC, USA;
  2. 2MedStar Health Research Institute, Hyattsville, Maryland, USA
  1. Correspondence to : Dr Raya E Kheirbek, VA Medical Center, 50 Irving Street North West, Washington DC 20422, USA; raya.kheirbek{at}

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ACE inhibitors (ACEIs) and angiotensin receptor blockers (ARBs) are commonly prescribed to older patients with hypertension, heart failure (HF) and chronic kidney disease (CKD) and may increase serum potassium (K) levels. Cotrimoxazole, a common antibiotic used to treat urinary tract infections, may also raise serum K levels, especially in patients also taking other drugs that raise serum K …

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  • Competing interests None.

  • Provenance and peer review Commissioned; internally peer reviewed.