Effects of grapefruit juice on pharmacokinetic exposure to indinavir in HIV-positive subjects.

Abstract:

:The objective of this study was to determine the effects of double-strength grapefruit juice on gastric pH and systemic bioavailability of indinavir in HIV-infected subjects receiving indinavir. Fourteen HIV-infected subjects took 800 mg of indinavir with 6 ounces (180 ml) of water or double-strength grapefruit juice. Gastric pH was measured and blood samples were collected for 5 hours after indinavir dosing. Grapefruit juice increased the mean gastric pH (from 1.39 +/- 0.4 to 3.20 +/- 0.3; p < 0.05) and slightly delayed the absorption of indinavir (tmax increased from 1.12 +/- 0.8 h to 1.56 +/- 0.6 h; p < 0.05). However, there were no significant differences in indinavir exposure. Cmax was 16.7 +/- 7.3 microM with water versus 13.9 +/- 4.2 microM with grapefruit juice (p = NS), and AUC0-8 was 37.5 +/- 19 with water versus 36.9 +/- 15 with grapefruit juice (p = NS). The authors concluded that concomitant administration of grapefruit juice increases gastric pH and delays indinavir absorption but does not uniformly affect the systemic bioavailability of indinavir in HIV-infected subjects.

journal_name

J Clin Pharmacol

authors

Shelton MJ,Wynn HE,Hewitt RG,DiFrancesco R

doi

10.1177/00912700122010140

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

435-42

issue

4

eissn

0091-2700

issn

1552-4604

journal_volume

41

pub_type

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