Abstract
Comorbidities in the elderly not only make them more susceptible to kidney disease, but also increase the risk of drug interactions due to polypharmacy. Such patients require regular kidney function tests when treated with renally excreted drugs. We conducted a retrospective study of post-mortem cases over a five- year period. Of 3040 toxicologically investigated cases, 3.8% had a history of renal failure. Thirteen deaths were directly attributable to inadequate drug dosing, 46% of which were related to lactic acidosis due to metformin accumulation. Appropriate dose adjustment could prevent fatal drug toxicity in patients with renal insufficiency.
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