Comparative study of three routes of administration of sisomicin

A comparative study was performed using three routes of administration of sisomicin (1 mg/kg as single dose): intramuscular injection, intravenous rapid injection, and 1-hour infusion. Intravenous administration resulted in higher blood levels immediately after the injections than by the intramuscular route; however, later, the intramuscular injection resulted in optimal blood levels. High levels of sisomicin which were bactericidal for most Gram-negative bacilli were found in the urine of the treated patients. The antimicrobial activity of the serum obtained 1 hour after administration of sisomicin, as determined against 20 strains of Gram-negative microorganisms isolated from blood cultures, was identical with all three routes of administration of sisomicin.
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