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Linezolid-induced rare triad of hypoglycaemia, bone marrow suppression and hyponatraemia in elderly.

Abstract：

WHAT IS KNOWN AND OBJECTIVE:Linezolid, a member of the oxazolidinone class of antibacterial drugs, is approved by the US Food and Drug Administration (FDA) for the treatment of vancomycin-resistant Enterococcus faecium infections, nosocomial and community-acquired pneumonia, as a part of anti tubercular regimen and complicated and uncomplicated skin and soft tissue infections, including diabetic foot infections. Linezolid has potential adverse effects like bone marrow suppression, peripheral neuropathy and hyponatremia. One of the extremely rare reported adverse effects of the drug is hypoglycaemia. We present a case of Linezolid toxicity presenting as resistant hypoglycemia, bone marrow suppression and severe hyponatremia all together in a single patient. CASE DESCRIPTION:We present a case of an 82 years old gentleman with no known chronic co-morbidities. He was started on Linezolid 600 mg twice a day for 10 days by a local doctor possibly for some minor infection post hip surgery. He was in respiratory distress on arrival. Blood sugars showed severe hypoglycemia of 36 mg/dL (2.0 mmol/L). He was admitted in intensive care unit and started on injectable antibiotics and 5% dextrose infusion and sugars were strictly monitored. His blood tests revealed severe hyponatremia with sodium level of 119 mEq/L and haemoglobin (Hb) of 8.8 gm/dL, leucocytes of 6500/µL, platelets of 82 000/µL. The infection markers were normal throughout. The platelet count went progressively down from 82 000/µL on admission to 20 000/µL 2 days later; before it started rising back. Similarly there was drop in Hemoglobin and white cell counts. He required vasopressors to maintain mean arterial pressures. The blood sugar levels stabilized after the same. However patient had suffered acute lung injury secondary to aspiration and became NIV dependent and eventually passed away. WHAT IS NEW AND CONCLUSION:Our case was unique in a way that our patient had adverse effects of linezolid like myelosuppression as well as the rare side effects of hypoglycemia at the same time. This combination of adverse events has never been described in the past to our knowledge. All the adverse effects responded to antibiotic de-challenge in our case. We had ruled out the possibility of other causes of Hypoglycemia such as sepsis, insulinoma, alcohol excess, malnutrition or hypoadrenalism. We searched the PubMed database and found four case reports out of which two were diabetics and other two were non diabetics. Out of 15 cases described by Vishwanathan et al only three cases were non diabetics. Our patient was non diabetic as well. Therefore our case is only the sixth reported case of hypoglycemia in non diabetic receiving Linezolid to our knowledge.

journal_name

J Clin Pharm Ther

journal_title

Journal of clinical pharmacy and therapeutics

authors

Singhania SVK,Shenoy S,Kapoor D

doi

10.1111/jcpt.13069

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

376-378

issue

eissn

0269-4727

issn

1365-2710

journal_volume

pub_type

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Linezolid-induced rare triad of hypoglycaemia, bone marrow suppression and hyponatraemia in elderly.