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Effects of highly overdosed indomethacin in a preterm infant with symptomatic patent ductus arteriosus

V Schuster1, H B von Stockhausen, H W Seyberth

  • 1Department of Paediatrics, University of Würzburg, Federal Republic of Germany.

Insights

A preterm infant with severe respiratory distress syndrome experienced a 100-fold overdose of indomethacin, a medication used to treat patent ductus arteriosus. Surprisingly, the infant showed no adverse effects, likely due to good health and fluid intake.

Area of Science:

  • Neonatal medicine
  • Pharmacology
  • Pediatric cardiology

Background:

  • Idiopathic respiratory distress syndrome (iRDS) is a common neonatal condition requiring intensive respiratory support.
  • Symptomatic patent ductus arteriosus (sPDA) frequently complicates iRDS, necessitating medical or surgical intervention.
  • Indomethacin is a standard treatment for sPDA, aiming to induce ductal constriction.

Observation:

  • A preterm infant with severe iRDS requiring high ventilatory support developed sPDA.
  • An accidental 100-fold overdose of indomethacin was administered during sPDA treatment.
  • The infant was in good clinical condition with sufficient fluid intake prior to the overdose.

Findings:

  • Despite the massive indomethacin overdose, the infant did not develop expected side effects like renal failure.
  • Rapid and persistent closure of the patent ductus arteriosus was achieved.
  • The overdose did not appear to negatively impact the infant's overall clinical status.

Implications:

  • This case suggests a potentially wider safety margin for indomethacin in select preterm infants than previously assumed.
  • Sufficient hydration and a stable clinical condition may mitigate indomethacin-induced renal toxicity.
  • Further investigation into the pharmacokinetics and safety of high-dose indomethacin in neonates may be warranted.

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