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Very early exposure to erythromycin and infantile hypertrophic pyloric stenosis

William O Cooper1, Marie R Griffin, Patrick Arbogast

  • 1Department of Pediatrics, Division of General Pediatrics, Vanderbilt University School of Medicine, Suite 5028 MCE, Nashville, TN 37232-8555, USA. william.cooper@mcmail.vanderbilt.edu

Archives of Pediatrics & Adolescent Medicine
|July 2, 2002
PubMed

Insights

Very early erythromycin exposure in infants significantly increases the risk of pyloric stenosis by nearly eightfold. This association highlights the need to carefully consider erythromycin risks versus benefits in neonates.

Area of Science:

  • Pediatric Gastroenterology
  • Neonatal Pharmacology
  • Public Health

Background:

  • Pyloric stenosis is a significant concern in infant health.
  • Erythromycin is a commonly prescribed antibiotic for infants.
  • Previous studies have suggested a potential link between erythromycin and pyloric stenosis.

Purpose of the Study:

  • To investigate the association between early-life erythromycin exposure and the incidence of pyloric stenosis in infants.
  • To quantify the risk of pyloric stenosis associated with specific timing of erythromycin exposure.

Main Methods:

  • Retrospective cohort study utilizing Medicaid and TennCare birth data from Tennessee (1985-1997).
  • Identified infant cases of pyloric stenosis through hospital discharge diagnoses and surgical procedure codes.
  • Assessed antibiotic exposure, specifically erythromycin, within the first 90 days of life from prescription records.

Main Results:

  • A cohort of 933,239 births was analyzed, with 314,029 enrolled in Medicaid.
  • 804 infants (2.6/1000) were diagnosed with pyloric stenosis.
  • Very early erythromycin exposure (3-13 days) showed an almost 8-fold increased risk (aIRR, 7.88; 95% CI, 1.97-31.57).
  • No increased risk was observed for later erythromycin exposure or exposure to other antibiotics.

Conclusions:

  • Early erythromycin exposure in infants is strongly linked to an increased risk of pyloric stenosis.
  • The findings are consistent with prior research on this association.
  • Clinicians should carefully weigh the benefits and risks before prescribing erythromycin to young infants.
Abstract

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