Abstract

The efficacy, tolerance and pharmacokinetics of the new aminoglycoside antibiotic sisomicin, have been studied in 29 elderly male patients with varying degrees of renal function impairment and suffering from complicated urinary tract infections. The antibiotic was equally effective in patients with normal and impaired renal function and a cure (negative urine culture at one week follow-up) of 56% was obtained. There was little apparent toxicity with the dosage regimens used, although serum creatinine values were statistically but not clinically significantly increased in some patients following treatment. Serum half-lives of sisomicin were prolonged in cases of impaired renal function but accumulation of antibiotic could be prevented by varying dosing intervals between 8 and 24 hours based on serum creatinine values. There was good correlation between serum creatinine and sisomicin serum half-life values and a practical method is described for dose adjustment based on the relationship between serum half-lives and serum creatinine concentrations.

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