title: Effects of the flavonol quercetin on the bioavailability of simvastatin in pigs.
abstract: The influence of the dietary flavonol quercetin on the pharmacokinetics of the HMG-CoA reductase inhibitor simvastatin was investigated in pigs. Simvastatin (0.25mg/kg body weight) was orally administered to six pigs either without or with quercetin (10mg/kg). In addition, simvastatin was administered to three pigs that had received a diet supplemented with the flavonol over a period of 1 week. Daily quercetin intake was 10mg/kg in these animals. Co-ingestion of quercetin with the statin did not alter area under the concentration time curve (AUC(0-->infinity)), time to achieve maximum plasma concentration (t(max)) or half-life (t(1/2)) of simvastatin. However, there was a trend towards a reduction of the maximum plasma concentration (C(max)) of simvastatin when quercetin was administered concomitantly (P=0.06). As compared to controls, AUC(0-->infinity) of simvastatin was significantly decreased after feeding the quercetin-supplemented diet for 1 week. The plasma ratio of simvastatin and its acid metabolite was neither altered by the concomitant quercetin ingestion nor by feeding of the flavonol over a period of 1 week. We conclude that chronic ingestion of high doses of the flavonol quercetin will decrease the bioavailability of simvastatin to a significant extent.
authors.affiliation: Institute of Veterinary Physiology, University of Leipzig, An den Tierkliniken 7, 04103 Leipzig, Germany. cermak@vetmed.uni-leipzig.de
authors.forename: Rainer
authors.initials: R
authors.lastname: Cermak
authors.forename: Silvia
authors.initials: S
authors.lastname: Wein
authors.forename: Siegfried
authors.initials: S
authors.lastname: Wolffram
authors.forename: Peter
authors.initials: P
authors.lastname: Langguth
mesh_terms: D000818:Animals; D001682:Biological Availability; D018592:Cross-Over Studies; D044948:Flavonols / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics*; D018565:Food-Drug Interactions / Q000502:physiology*; D008297:Male; D011794:Quercetin / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics*; D019821:Simvastatin / Q000097:blood / Q000493:pharmacokinetics*; D013552:Swine
chemical_list: D044948:Flavonols; D011794:Quercetin; D019821:Simvastatin