Vastcillin granules ‘Takeda’, a cyclacillin (AC-PC) preparation for children were orally administered to nine children at a single dose of 10mg/kg and its blood concentrations and urinary excretion were studied. From the results obtained, the following conclusions were obtained as to clinical dose and indications.
(1) Absorption of AC-PC of Vastcillin granules is excellent. At 15 minutes after administration, 9.3mcg/ml of AC-PC blood level was attained and its peak appeared 30 minutes after administration. The mean peak level was 17.6mcg/ml.
(2) Urinary excretion was highest during the first 2 hours after administration. The mean urinary recovery during 6 hours after administration was 52.6% of the given dose.
(3) In case that the causative organisms are gram-positive bacteria such as
Staphylococcus aureus, administration of 10mg/kg or a little more three to four times per day is to be considered adequate.
(4) Vastcillin is most effectively indicated for respiratory-tract infections which are mainly caused by gram-positive bacteria and is expected to be effectively indicated for urinary-tract infections.
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