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Ertapenem-Induced Hallucinations and Delirium in an Elderly Patient

Ertapenem-Induced Hallucinations and Delirium in an Elderly Patient

Consultant Pharmacist 31(4): 207-214

To report a case of ertapenem-induced hallucinations and delirium in an elderly, morbidly obese patient. A 71-year-old male was receiving intravenous antibiotics at an outside nursing facility through our Outpatient Parenteral Antimicrobial Therapy (OPAT) program, which has enrolled more than 800 patients since 2009. He was admitted to our medical center, a 673-bed tertiary health care facility, which provides care to more than 100,000 veterans in Northeast Ohio. Our patient was admitted with an acute heart failure exacerbation after being discharged four weeks prior with a plan to complete six weeks of intravenous daptomycin 1 g daily and ertapenem 1 g daily for a left-calcaneal diabetic foot osteomyelitis. On initial exam, in addition to volume overload, he was noted to have fluctuating orientation, hallucinations, and suicidal ideations, which were all a significant change from his baseline mentation. A physical, laboratory, and radiologic workup revealed no conclusive etiology for his symptoms, at which point drug-induced toxicity was suspected. Upon discontinuation of ertapenem, the patient rapidly improved over the next 72 hours, including return to baseline mentation and absence of any suicidal thoughts. Use of the Naranjo probability scale indicated a probable relationship between ertapenem and the adverse effects experienced by our patient. This case report and literature review demonstrates the potential severity of non-seizure-related neurotoxicity associated with ertapenem. As this toxicity can be life-threatening if unrecognized, it is crucial that clinicians across all practice settings be proactive in detecting and preventing it.

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Accession: 057793948

Download citation: RISBibTeXText

PMID: 27056357

DOI: 10.4140/TCP.n.2016.207

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