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Antimicrobial Agents and Chemotherapy, September 2006, p. 3157-3159, Vol. 50, No. 9
0066-4804/06/$08.00+0     doi:10.1128/AAC.00093-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Interaction between Fosamprenavir, with and without Ritonavir, and Nevirapine in Human Immunodeficiency Virus-Infected Subjects

Edwin DeJesus,1 Peter J. Piliero,2 Kim Summers,3 Mary Beth Wire,4 Daniel S. Stein,5 Amanda Masterman,6 Yu Lou,4 Sherene S. Min,4 and Mark J. Shelton4*

Orlando Immunology Center, Orlando, Florida,1 Boehringer Ingelheim, Ridgefield, Connecticut,2 San Antonio VA, San Antonio, Texas,3 GlaxoSmithKline, Research Triangle Park, North Carolina,4 Sanofi-Aventis, Bridgewater, New Jersey,5 GlaxoSmithKline, Mississauga, Ontario, Canada6

Received 23 January 2006/ Returned for modification 15 May 2006/ Accepted 11 June 2006

Fosamprenavir (FPV) with and without ritonavir (RTV) was added to the antiretroviral regimens of human immunodeficiency virus-infected subjects receiving nevirapine (NVP) to evaluate this drug interaction. Significant reductions in plasma amprenavir exposure (25 to 35%) were observed following coadministration of 1,400 mg of FPV twice a day (BID) and 200 mg of NVP BID. A regimen of 700 mg of FPV BID plus 100 mg of RTV BID may be coadministered with NVP without dose adjustment.


* Corresponding author. Mailing address: GlaxoSmithKline, Five Moore Drive, Research Triangle Park, NC 27709. Phone: (919) 483-5062. Fax: (919) 315-4276. E-mail: Mark.J.Shelton{at}GSK.com.


Antimicrobial Agents and Chemotherapy, September 2006, p. 3157-3159, Vol. 50, No. 9
0066-4804/06/$08.00+0     doi:10.1128/AAC.00093-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.