• Paediatric anaesthesia · Jan 1997

    Plasma concentrations after rectal administration of acetaminophen in preterm neonates.

    • Y C Lin, H H Sussman, and W E Benitz.
    • Department of Anesthesia, Stanford University School of Medicine, California 94305, USA.
    • Paediatr Anaesth. 1997 Jan 1; 7 (6): 457-9.

    AbstractAcetaminophen is frequently administered to infants and children for its antipyretic and analgesic properties. Oral administration is the route of choice in daily practice. In some circumstances this is impractical. Rectal administration of acetaminophen is an alternative route. This study measures plasma concentrations following rectal administration of acetaminophen 20 mg.kg-1 (10% Infants' Tylenol Drops, McNeil Consumer Product Co., diluted with an equal volume of sterile water) in five preterm neonates. Serial arterial blood samples were obtained at 0, 15, 30, 60, 120, and 240 min. Pharmacokinetic parameters were (mean +/- SD): Cmax (maximum plasma concentration) of 8.38 +/- 3.92 micrograms.ml-1 and Tmax (time to reach maximum plasma concentration) of 78.0 +/- 40.2 min. Our results show that 20 mg.kg-1 of acetaminophen rectally results in low plasma levels in preterm neonates.

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