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  • Title: Pharmacokinetics of ceftizoxime in subjects with various degrees of renal function.
    Author: Kowalsky SF, Echols RM, Venezia AR, Andrews EA.
    Journal: Antimicrob Agents Chemother; 1983 Aug; 24(2):151-5. PubMed ID: 6314884.
    Abstract:
    The pharmacokinetics of ceftizoxime (FK-749) were studied in 20 volunteers with various degrees of renal function. Creatinine clearances ranged from zero to 157 ml/min per 1.73 m2. One gram of ceftizoxime was administered by a 30-min drip infusion, and blood and urine samples were collected for up to 48 h after drug administration. For volunteers with a creatinine clearance of greater than or equal to 80 ml/min per 1.73 m2 (group I), the mean half-life was 1.65 h, whereas for volunteers with a creatinine clearance of less than 10 ml/min per 1.73 m2 (group IV), the half-life was 34.7 h. The volume of distribution at steady state (Vdss) and the volume of distribution area (Vdarea) were calculated for each group and ranged from 0.377 to 0.263 and 0.421 to 0.264 liters/kg for groups I and IV, respectively. Total body clearance of ceftizoxime correlated with creatinine clearance (r = 0.953), and the mean urinary recovery of unchanged drug in normal volunteers was 72.4%. A 4-h hemodialysis procedure reduced serum ceftizoxime concentrations by approximately 52%; however, serum concentrations at 48 h after drug administration were still greater than 10 micrograms/ml in dialysis subjects. By using the relationship between total body clearance of ceftizoxime and creatinine clearance, a nomogram was developed to assist in the administration of ceftizoxime to patients with renal dysfunction.
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