Dosage Regimen Adjustments in Renal Impairment

A pharmacokinetic approach based on creatinine clearance has been outlined which permits drug dosage regimen adjustments in patients with renal impairment. The parameters needed for calculating a loading dose and a maintenance regimen are the fraction of a dose excreted unchanged in the urine, the creatinine clearance of the patient, and the half-life of the drug in patients with normal renal function. In varying degrees of renal failure, predicted dosage regimens agree closely with dosage regimens predicted by other methods for a number of drugs.