Dosage regimen of ranitidine in patients with renal impairment.

The validity of the Giusti-Hayton method for dosage regimen adjustment in patients with renal impairment was investigated using ranitidine. Five normal healthy volunteers received a single ranitidine recommended dose of 150 mg, and 20 patients with renal disease received single administration in doses individually calculated by the Giusti-Hayton method from each patient's creatinine clearance level, and the various pharmacokinetic parameters were compared. As a result, the area under the time-concentration curve 0----infinity (AUC0----infinity) in the renal disease patients was almost comparable to that in the normal healthy volunteers. The Giusti-Hayton method was considered useful to keep both the AUC0----infinity constant and the mean blood level of the drug in a steady state, in any degree of renal impairment.