Abstract
The present study aimed to investigate the effect of fluvastatin on the pharmacokinetics of diltiazem in rats. Pharmacokinetic parameters of diltiazem were determined in rats following an oral administration of diltiazem (15 mg/kg) in the presence and absence of fluvastatin (0.6 and 2.0 mg/kg). Compared with the control given diltiazem alone, the C(max) and AUC of diltiazem increased by 30-70% in rats with the concurrent use of fluvastatin, while there was no significant change in T(max) and the plasma half-life (T(1/2)) of diltiazem. Consequently, absolute and relative bioavailability values of diltiazem in the presence of fluvastatin were significantly higher (p<0.05) than those from the control group, implying that fluvastatin could reduce the presystemic extraction of diltiazem. In conclusion, the concurrent use of fluvastatin significantly enhanced the oral exposure of diltiazem in rats.
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