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Antimicrobial Agents and Chemotherapy, May 2004, p. 1904-1907, Vol. 48, No. 5
0066-4804/04/$08.00+0     DOI: 10.1128/AAC.48.5.1904-1907.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Pharmacokinetics of Indinavir Combined with Low-Dose Ritonavir in Human Immunodeficiency Virus Type 1-Infected Children

A. S. Bergshoeff,1,2* P. L. A. Fraaij,3 A. M. C. van Rossum,3 G. Verweel,3 L. H. Wynne,4 G. A. Winchell,4 R. Y. Leavitt,4 B.-Y. T. Nguyen,4 R. de Groot,3 and D. M. Burger1,2

University Medical Center, Department of Clinical Pharmacy,1 Nijmegen University Center for Infectious Diseases, Nijmegen,2 Erasmus MC/Sophia, Division of Pediatric Infectious Diseases and Immunology, Rotterdam, The Netherlands,3 Merck & Co., Inc., West Point, Pennsylvania4

Received 5 August 2003/ Returned for modification 9 October 2003/ Accepted 8 January 2004

So far, no pediatric doses for indinavir combined with ritonavir have been defined. This study evaluated the pharmacokinetics of 400 mg of indinavir/m2 combined with 125 mg of ritonavir/m2 every 12 h (q12h) in 14 human immunodeficiency virus type 1-infected children. The area under the concentration-time curve from 0 to 24 h and the minimum concentration of drug in serum for indinavir were similar to those for 800 mg of indinavir-100 mg of ritonavir q12h in adults, while the maximum concentration of drug in serum was slightly decreased, with geometric mean ratios (90% confidence intervals in parentheses) of 1.1 (0.87 to 1.3), 0.96 (0.60 to 1.5), and 0.80 (0.68 to 0.94), respectively.


* Corresponding author. Mailing address: Department of Clinical Pharmacy, University Medical Center, P.O. Box 9101, 533 KF, 6500 HB Nijmegen, The Netherlands. Phone: 31.24.3616405. Fax: 31.24.3540331. E-mail: d.burger{at}akf.umcn.nl.


Antimicrobial Agents and Chemotherapy, May 2004, p. 1904-1907, Vol. 48, No. 5
0066-4804/04/$08.00+0     DOI: 10.1128/AAC.48.5.1904-1907.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.




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