Pharmacokinetics of Ranitidine after Intravenous Administration in Hemodialysis Patients

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Abstract
The pharmacokinetics of ranitidine and its removal by hemodialysis were determined in 9 patients with chronic renal failure requiring hemodialysis. Ranitidine (50 mg) was administered as an intravenous bolus at the beginning of the dialysis procedure, which lasted for 4 h. The elimination half-life, plasma clearance and volume of distribution (VD area) of ranitidine in these patients were 9.0 ± 2.6 h (mean ± SD), 305 ± 152 ml/min and 3.5 ± 1.9 liters/kg, respectively. About 8% of the administered dose was removed during a single dialysis procedure. The elimination of ranitidine is appreciably reduced in these patients. These results suggest that the dose of ranitidine should be adjusted in patients with severe renal failure who are undergoing hemodialysis, and a suitable schedule for dosing such patients is suggested.

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