Send to

Choose Destination
See comment in PubMed Commons below
J Perinat Med. 2011 Jan;39(1):55-8. doi: 10.1515/JPM.2010.113. Epub 2010 Oct 18.

Effect of ibuprofen on bilirubin-albumin binding affinity in premature infants.

Author information

  • 1Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, NY, USA.



To evaluate the effect of ibuprofen on bilirubin-albumin binding affinity and unbound bilirubin in premature infants.


A prospective study with subjects serving as their own controls was performed on <30 weeks' gestational age infants with unconjugated hyperbilirubinemia and who received ibuprofen for patent ductus arteriosus. Infants with congenital malformation, TORCH infections, and conjugated hyperbilirubinemia were excluded. Total serum bilirubin (TSB) and unbound bilirubin (modified peroxidase test) were measured prior to (baseline) and after (follow-up) initiation of ibuprofen. The bilirubin/albumin equilibrium association binding constant was calculated using albumin, TSB, and unbound bilirubin.


Ten infants were studied. The mean TSB between baseline (5.9±1.7 mg/dL) was higher than that at follow-up [4.9±1.7 mg/dL]. Mean unbound bilirubin at baseline (0.75±0.65 μg/dL) was similar to that at follow-up (0.63±0.46 μg/dL). No difference existed between mean baseline binding constant (49±50 L/μmol) and that at follow-up (44±36 L/μmol). The ratio of unbound bilirubin with and without ibuprofen, index of displacing effect, was 0.88 (95% CI 0.63-1.14).


Ibuprofen may not be associated with bilirubin displacing effect in relatively stable premature infants with mild to moderate unconjugated hyperbilirubinemia.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for iFactory Icon for PubMed Central
    Loading ...
    Write to the Help Desk