Title: Co-ingestion of dihydropyridine with ARBs/ACEIs can cause more significant hypotension<br/>Author: Hong Kim<br/><a href='http://umem.org/profiles/faculty/526/'>[Click to email author]</a><hr/><p>
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Dihydropyridine (calcium channel blocker) overdose is one of the leading causes of death from cardiovascular drug poisoning. In contrast, angiotensin-II receptors blockers (ARBs) and angiotensin converting enzyme inhibitor (ACEIs) causes minimal toxicity in overdose. Frequently, these medications are co-ingested with dihydropridines. </p>
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Recently, a retrospective study was conducted to evaluate the hemodynamic impact of dihydropyridines with ARBs/ACEIs co-ingestion.</p>
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<strong>Results</strong></p>
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Cohort</p>
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68 mixed overdoses of dihydropyridines with ARBs/ACEIs</li>
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21 single agent overdose (dihydropyridines)</li>
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Mixed overdose group had:</p>
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Lower median nadir mean arterial pressure: 62 vs. 75 mmHg (p<0.001)</li>
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Higher OR for hypotension: OR 4.5, (95% CI: 1.7 – 11.9)</li>
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Higher OR for bradycardia: OR 8.8 (95% CI: 1.1 – 70) </li>
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Lower minimum systolic blood pressure by 11.5 mmHg (95% CI: 4.9 – 18.1)</li>
</ul>
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Higher proportion of the mixed overdose group received:</p>
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IV fluids: OR 5.7, (95% CI: 1.8-18.6)</li>
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Antidotes and/or vasopressor: OR 2.9 (95% CI: 1.004 – 8.6)</li>
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<strong>Conclusion</strong></p>
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Combined overdose of dihydropyridines with ARBs/ACEIs can result in more significant hypotension.</p>
<fieldset><legend>References</legend>
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Huang J et al. Angiotensin axis antagonists increase the incidence of haemodynamic instability in dihydropyridine calcium channel blocker poisoning. Clint Toxicol (Phila) 2020. Epub. <a href="https://doi.org/10.1080/15563650.2020.1826504">https://doi.org/10.1080/15563650.2020.1826504</a></p>
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