title: Zidovudine (AZT) overdose in a healthy newborn receiving postnatal prophylaxis.
abstract: BACKGROUND
  Pediatric medication dosing and administration, faced with inherent challenges of dose to body weight adjustment and variable delivery vehicles, may lead to inadvertent errors effectively resulting in overdose. Zidovudine (AZT), a nucleoside analog reverse transcriptase inhibitor (NRTI), is a commonly prescribed medication to treat HIV-exposed newborns, with limited overdose data in this patient population. Metabolic acidosis with elevated lactate is the most serious consequence of AZT toxicity in the adult population, associated with mortality. Other significant effects may include neutropenia and hepatic dysfunction.
  
  
  METHODS
  A 4-day-old male infant who received two inadvertent 10-fold overdoses of AZT while being treated for HIV postnatal prophylaxis. The newborn developed a transient metabolic acidosis with elevated lactate that resolved within 24 h, a small increase in AST, and persistent neutropenia for 5 weeks. The patient's mother cited several key factors leading to the dosing error.
  
  
  CONCLUSIONS
  The paucity of AZT overdose data in newborns and infants compels this case report, which reviews the published literature and provides insight into prevention and improvement of pediatric patient safety.
authors.affiliation: New York City Poison Control Center, New York, NY 10016, United States. doczhanna@gmail.com
authors.forename: Zhanna
authors.initials: Z
authors.lastname: Livshits
authors.forename: Simon
authors.initials: S
authors.lastname: Lee
authors.forename: Robert S
authors.initials: RS
authors.lastname: Hoffman
authors.forename: Lewis S
authors.initials: LS
authors.lastname: Nelson
authors.forename: Nora
authors.initials: N
authors.lastname: Esteban-Cruciani
mesh_terms: D000138:Acidosis / Q000097:blood / Q000139:chemically induced; D000410:Alanine Transaminase / Q000097:blood; D019380:Anti-HIV Agents / Q000506:poisoning* / Q000627:therapeutic use; D062787:Drug Overdose; D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans; D007231:Infant, Newborn; D019344:Lactic Acid / Q000097:blood; D008297:Male; D008508:Medication Errors; D009503:Neutropenia / Q000097:blood / Q000139:chemically induced; D015215:Zidovudine / Q000506:poisoning* / Q000627:therapeutic use
chemical_list: D019380:Anti-HIV Agents; D019344:Lactic Acid; D015215:Zidovudine; D000410:Alanine Transaminase