A single injection of AmB solution, solubilized at 10–4 M in carbonate bicarbonate (10 mM) to 10.8 pH buffer, disturbed renal parameters (urea and creatinin), and these disruptions persist beyond by one-week follow- up (Figure 1). However, the single injection of a solution of AmB solubilized at 10–4 M in acetate/acetic acid buffer (100 mM), pH 5.4 at 1 mg/kg, did not induce any significant disruption of the renal parameters, urea and creatinin, in Wistar rats (Figure 2). It seems then that the prepared solution AmB of pH 5.4 is better tolerated than that prepared at pH 10.8 on a renal plan following