Pharmacokinetic and clinical studies of cefuzoname in the pediatric field

: Newly developed cefuzoname (CZON) was tested in 21 children and serum and urinary concentration and urinary recovery rates were determined. To 9 cases, 3 groups of 3 cases each, CZON was given at 10, 20 or 40 mg/kg one shot intravenously, and to 12 cases, 3 groups of 5, 3, 4 cases each, 10, 20 or 40 mg/kg was drip-infused over 1 hour. To 1 case of purulent meningitis 55.6 mg/kg was given one shot intravenously and concentrations in cerebrospinal fluid (CSF) and serum were measured. In 37 pediatric patients comprising 1 with tonsillitis, 24 with pneumonia, 1 with purulent meningitis and bacteremia, 7 with urinary tract infection, and 1 each with staphylococcal scalded skin syndrome, purulent lymphadenitis, periarthritis of jaw joint, maxillary sinusitis and orbital abscess, CZON was tried at 21.6 mg/kg (mean) per dose, 3 or 4 doses daily, one shot intravenously, for 7 days (mean). The clinical efficacy and antibacterial effectiveness were investigated. Also, the side effects were investigated and clinical laboratory tests done in the 37 pediatric cases plus 6 cases in which CZON was used but which were excluded from the efficacy analysis because they did not involve infections. The following is a summary of the results: 1. To 3 groups of 3 children each, 10, 20 or 40 mg/kg of CZON was given one shot intravenously. In each case the maximum serum concentration was observed at 5 min. after injection, and mean values of 3 groups with 10, 20 and 40 mg/kg dosing were 57.1, 147.2 and 316.7 mcg/ml respectively, indicating a dose-dependent response among the 3 groups. Mean half-lives were 0.83, 1.10 and 0.79 hours for 10, 20 and 40 mg/kg groups, respectively. The 10 mg/kg and the 40 mg/kg groups showed similar half-lives but the half-life of the 20 mg/kg group was a little longer than those of the other 2. 2. CZON was drip-infused over 1 hour to a total of 12 children divided into 3 groups of 5, 3 and 4 children at dose levels of 10, 20 and 40 mg/kg, respectively.(ABSTRACT TRUNCATED AT 400 WORDS)