The increasing prevalence of multi-drug resistant Gram-negative pathogens in intensive care units has led to the revival of colistin. Colistin had gone into disrepute in early 1970s because of numerous reports of adverse renal and neurological effects. The renewed interest in colistin has also revived the discussion about its toxicity. The neurotoxicity reported in literature is usually with higher doses of colistin. We present a case report of seizures in a critically ill-patient, possibly with low dose colistin. A 47-year-old hypertensive female with chronic kidney disease-5 with sepsis on colistimethate sodium 1 million units (80 mg), intravenous once daily, developed paresthesias and seizures on 12th day of therapy, which were subsequently controlled after withdrawl of the drug. To conclude, colistin should be considered as a cause of convulsions in critically ill-patients with renal failure, even when given in low dose and patient receiving intermittent hemodialysis, when other obvious causes have been ruled out. When possible, cessation of therapy may be considered.
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