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Pharmacokinetics of levamisole in the red‐eared slider turtles (Trachemys scripta elegans)
Authors:Orhan Corum  Duygu Durna Corum  Orkun Atik  Feray Altan  Ayse Er  Kamil Uney
Abstract:The pharmacokinetics and bioavailability of levamisole were determined in red‐eared slider turtles after single intravenous (IV), intramuscular (IM), and subcutaneous (SC) administration. Nine turtles received levamisole (10 mg/kg) by each route in a three‐way crossover design with a washout period of 30 days. Blood samples were collected at time 0 (pretreatment), and at 0.25, 0.5, 1, 1.5, 3, 6, 9, 12, 18, 24, 36, and 48 hr after drug administration. Plasma levamisole concentrations were determined by a high‐performance liquid chromatography assay. Data were analyzed by noncompartmental methods. The mean elimination half‐life was 5.00, 7.88, and 9.43 hr for IV, IM, and SC routes, respectively. The total clearance and volume of distribution at steady state for the IV route were 0.14 L hr?1 kg?1 and 0.81 L/kg, respectively. For the IM and SC routes, the peak plasma concentration was 9.63 and 10.51 μg/ml, respectively, with 0.5 hr of Tmax. The bioavailability was 93.03 and 115.25% for the IM and SC routes, respectively. The IM and SC route of levamisole, which showed the high bioavailability and long t1/2?z, can be recommended as an effective way for treating nematodes in turtles.
Keywords:bioavailability  levamisole  pharmacokinetics  red‐eared slider turtles
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