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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Pharmacokinetics of tetracycline in the domestic rabbit following intravenous or oral administration.

Tetracycline hydrochloride was administered to domestic rabbits using a single bolus by the intravenous and oral routes. Pharmacokinetic parameters were determined for intravenous (10 mg/kg) and oral (150 mg/kg) administration. The effect of fasting for 12 h on the drug elimination kinetics after oral administration was evaluated. Tetracycline was added to the drinking water at 800 mg/L or 1600 mg/L. Drug and water intake and serum levels were monitored. Mean serum pharmacokinetic parameters following intravenous administration were; 0 intercept beta curve B (microgram/mL) = 7.5, rate of elimination from body -b (min-1) = 0.0058, half life elimination from body -t 1/2 b (min) = 120.0, wt(kg) = 3.2 determined using combined male and female data. Mean serum pharmacokinetic parameters after oral administration (single bolus) were -B (microgram/mL) = 1.54 (full stomach) and 2.71 (empty stomach), b(min-1) = 0.0037 (full stomach) and 0.0035 (empty stomach), t 1/2 b (min) = 190.3 (full stomach) and 216.2 (empty stomach). Administration of tetracycline in the drinking water produced very low to nondetectable levels of drug in the serum, even at high dosage, and the 1600 mg/L drug concentration was accompanied by a significant drop in water intake. Thus, it is evident that concentrations of tetracycline of up to 1600 mg/L drinking water will not produce levels of antibiotic consistently detectable in the serum.[1]


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