Effect of grapefruit juice on blood cyclosporin concentration

Grapefruit juice increases blood concentrations of some dihydropyridine calcium-channel blockers, which are metabolised by the P450 enzymes that also metabolise cyclosporin. We evaluated, in a randomised cross-over study, the effect of grapefruit juice on blood cyclosporin concentrations in 14 healt...

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Bibliographic Details
Published in:	The Lancet (British edition) Vol. 345; no. 8955; p. 955
Main Authors:	Yee, G C, Stanley, D L, Pessa, L J, Dalla Costa, T, Beltz, S E, Ruiz, J, Lowenthal, D T
Format:	Journal Article
Language:	English
Published:	England 15-04-1995
Subjects:	Adolescent Adult Beverages Biological Availability Citrus Cross-Over Studies Cyclosporine - blood Cyclosporine - pharmacokinetics Female Humans Male
Online Access:	Get more information
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Summary:	Grapefruit juice increases blood concentrations of some dihydropyridine calcium-channel blockers, which are metabolised by the P450 enzymes that also metabolise cyclosporin. We evaluated, in a randomised cross-over study, the effect of grapefruit juice on blood cyclosporin concentrations in 14 healthy adults. Each subject was given oral cyclosporin 300 mg with 250 mL grapefruit juice, orange juice, or water. Area-under-the-curve (AUC) was significantly higher with grapefruit juice than with water or orange juice (means 7057, 4871, and 4932 ng h/mL, respectively; p < 0.0001). Thus grapefruit juice may provide a non-toxic and inexpensive alternative to drugs that are used to reduce cyclosporin dose.
ISSN:	0140-6736
DOI:	10.1016/S0140-6736(95)90700-9