A set of simple aids to drug dosage adjustment in renal insufficiency

A set of graphical aids to drug dosage adjustment is presented, consisting of 1) a nomogram for evaluation of the dosage adjustment factor, 2) a nomogram for estimation of the creatinine clearance from the serum creatinine level, 3) decision tables for selection of a clinically acceptable adjustment of the dosing regimen. The set is accompanied by a list of percentage fractions excreted unchanged in urine for selected drugs and requiring adjustment of the dosing regimen in renal insufficiency. An example of the utilization of the set is demonstrated in comparison with the usual procedures of dosing regimen adjustment.