Pharmacokinetics of felodipine in patients with impaired renal function.

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Abstract
1. The pharmacokinetics of felodipine and its effects on blood pressure and heart rate were studied in eight male patients aged between 28 and 57 years with a glomerular filtration rate, GFR, between 8 and 68 ml min-1, following single i.v. and oral administration. 2. Clearance, Cmax, AUC, Vss and V, of felodipine were unaffected by the renal disease. The metabolite excretion (14C-labelled) was slower than in healthy subjects. Initial renal clearance of these metabolites correlated with individual GFR values. The total amount of the dose excreted in the urine was also decreased.