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Antimicrobial Agents and Chemotherapy, October 2000, p. 2811-2815, Vol. 44, No. 10
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Valganciclovir Results in Improved Oral Absorption
of Ganciclovir in Liver Transplant Recipients
Mark D.
Pescovitz,1,*
John
Rabkin,2
Robert M.
Merion,3
Carlos V.
Paya,4
John
Pirsch,5
R. B.
Freeman,6
John
O'Grady,7
Charles
Robinson,8
Zung
To,8
Kristina
Wren,8
Ludger
Banken,9
William
Buhles,8 and
Frances
Brown10
Transplantation Section, Department of Surgery, and
Department of Microbiology/Immunology, Indiana University,
Indianapolis, Indiana 426021;
Liver/Pancreas Transplant Section, Oregon Health Sciences
University, Portland, Oregon 972012;
University of Michigan Medical Center, Ann Arbor, Michigan
481093; Divisions of Infectious Diseases
and Transplantation, Liver Transplant Unit, Mayo Clinic, Rochester,
Minnesota 559054; Department of Surgery,
University Hospital, University of Wisconsin, Madison, Wisconsin
537925; Division of Transplant Surgery,
New England Medical Center, Boston, Massachusetts
021116; Institute of Liver Studies,
King's College School of Medicine and Dentistry, London, SE5
9JP,7 and Roche Products Ltd.,
Welwyn Garden City, Herts, AL7 3AY,10 United
Kingdom; Roche Global Development, Palo Alto, California
943048; and F. Hoffman-La Roche AG,
4070 Basel, Switzerland9
Received 27 January 2000/Returned for modification 13 June
2000/Accepted 18 July 2000
The pharmacokinetics of an orally administered valine ester of
ganciclovir (GCV), valganciclovir (VGC), were studied. These were
compared to the pharmacokinetics of oral and intravenous GCV.
Twenty-eight liver transplant recipients received, in an open-label
random order with a 3- to 7-day washout, each of the following: 1 g of oral GCV three times a day; 450 mg of VGC per os (p.o.) once a day
(q.d.); 900 mg of VGC p.o. q.d.; and 5 mg of intravenous (i.v.) GCV per
kg of body weight q.d., given over 1 h. GCV and VGC concentrations
were measured in blood over 24 h. One-sided equivalence testing
was performed to test for noninferiority of 450 mg of VGC relative to
oral GCV (two-sided 90% confidence interval [CI] > 80%) and
nonsuperiority of 900 mg of VGC relative to i.v. GCV (two-sided 90%
CI < 125%). The exposure of 450 mg of VGC (20.56 µg · h/ml) was found to be noninferior to that of oral GCV (20.15 µg
· h/ml; 90% CI for relative bioavailability of 95 to 109%), and the
exposure of 900 mg of VGC (42.69 µg · h/ml) was found to be
nonsuperior to that of i.v. GCV (47.61 µg · h/ml; 90% CI = 83 to 97%). Oral VGC delivers systemic GCV exposure equivalent to
that of standard oral GCV (at 450 mg) or i.v. GCV (at 900 mg of VGC).
VGC has promise for effective CMV prophylaxis or treatment with
once-daily oral dosing in transplant recipients.
*
Corresponding author. Mailing address: Indiana
University, Department of Surgery, UH4258, 550 N. University Blvd.,
Indianapolis, IN 46202-5253. Phone: (317) 274-4370. Fax: (317)
278-3268. E-mail: mpescov{at}iupui.edu.
Antimicrobial Agents and Chemotherapy, October 2000, p. 2811-2815, Vol. 44, No. 10
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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