Title: Torsades de pointes and QT prolongation Associated with Antibiotics<br/>Author: Quincy Tran<br/><a href='http://umem.org/profiles/faculty/1281/'>[Click to email author]</a><hr/><p>
A new study confirmed the previously-known antibiotics to be associated with Torsades de pointes and QT prolongation (Macrolides, Linezolid, Imipenem and Fluoroquinolones). However, this study found new association between amikacin and Torsades de pointes/QT prolongation.</p>
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<strong>Methods</strong></p>
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The authors queried the United States FDA Adverse Event Reporting System (FAERS) from 01/01/2015 to 12/31/2017 for reports of Torsade de points/QT prolongation (TdP/QT).</p>
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Reporting Odd Ratio (ROR) was calculated as the ratio of the odds of reporting TdP/QTP versus all other ADRs for a given drug, compared with these reporting odds for all other drugs present in FAERS</p>
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<strong>Results</strong></p>
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FAERS contained 2,042,801 reports from January 1, 2015 to December 31, 2017. There were 3,960 TdP/QTP reports from the study period (0.19%).</p>
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Macrolides ROR 14 (95% CI 11.8-17.38)</p>
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Linezolid ROR 12 (95% CI 8.5-18)</p>
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Amikacin ROR 11.8 (5.57-24.97)</p>
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Imipenem-cilastatin ROR 6.6 (3.13-13.9)</p>
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Fluoroquinolones ROR 5.68 (95% CI 4.78-6.76)</p>
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<strong>Limitations:</strong></p>
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These adverse events are voluntary reports</p>
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There might be other confounded by concomitant drugs such as ondansetron, azole anti-fungals, antipsychotics.</p>
<fieldset><legend>References</legend>
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Teng C, Walter EA, Gaspar DKS, Obodozie-Ofoegbu OO, Frei CR. Torsades de pointes and QT prolongation Associations with Antibiotics: A Pharmacovigilance Study of the FDA Adverse Event Reporting System. Int J Med Sci. 2019 Jun 10;16(7):1018-1022.</p>
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