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  • Title: Pharmacokinetics of cefuroxime after intravenous, intramuscular, and subcutaneous administration to dogs.
    Author: Albarellos GA, Montoya L, Lorenzini PM, Passini SM, Lupi MP, Landoni MF.
    Journal: J Vet Pharmacol Ther; 2016 Feb; 39(1):40-4. PubMed ID: 25982523.
    Abstract:
    Cefuroxime pharmacokinetic profile was investigated in 6 Beagle dogs after single intravenous, intramuscular, and subcutaneous administration at a dosage of 20 mg/kg. Blood samples were withdrawn at predetermined times over a 12-h period. Cefuroxime plasma concentrations were determined by HPLC. Data were analyzed by compartmental analysis. Peak plasma concentration (Cmax ), time-to-peak plasma concentration (Tmax ), and bioavailability for the intramuscular and subcutaneous administration were (mean ± SD) 22.99 ± 7.87 μg/mL, 0.43 ± 0.20 h, and 79.70 ± 14.43% and 15.37 ± 3.07 μg/mL, 0.99 ± 0.10 h, and 77.22 ± 21.41%, respectively. Elimination half-lives and mean residence time for the intravenous, intramuscular, and subcutaneous administration were 1.12 ± 0.19 h and 1.49 ± 0.21 h; 1.13 ± 0.13 and 1.79 ± 0.24 h; and 1.04 ± 0.23 h and 2.21 ± 0.23 h, respectively. Significant differences were found between routes for Ka , MAT, Cmax , Tmax , t½(a) , and MRT. T > MIC = 50%, considering a MIC of 1 μg/mL, was 11 h for intravenous and intramuscular administration and 12 h for the subcutaneous route. When a MIC of 4 μg/mL is considered, T > MIC = 50% for intramuscular and subcutaneous administration was estimated in 8 h.
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