Mezlocillin pharmacokinetics in renal impairment

Mezlocillin kinetics was examined in 28 adult subjects with varying renal function. Mezlocillin 3 gm, was infused over 30 min. Mean peak plasma concentrations ranged from 204 to 253 mg/I. When the area under the curve (AUC) was plotted against creatinine clearance (CCr), the relationship found was expressed by the equation AUC = 656e(-0.01)(CCr). From this relationship a dosage nonogram was derived describing a power function with the following equaton: Dose fraction = 1.32--e(-0.01)(CCr). Therapeutic guidelines are suggested.