Small observed increases in AUC(0-24hr), by about 30% to 40% in mild to moderate renal impairment, compared to a patient with normal renal function, and lack of accumulation of drug with multiple doses irrespective of renal function, suggest that dose adjustments of zoledronic acid in mild (Clcr = 50– 80 ml/ min) and moderate renal impairment down to a creatinine clearance of 35 ml/ min are not necessary.