Pharmacokinetics and efficacy of long-term low-level administration of triclabendazole in urea molasses blocks against induced bovine and bubaline fasciolosis.

The pharmacokinetics and flukicidal efficacy of triclabendazole delivered in low doses on a daily basis through urea molasses blocks were studied in cattle and buffaloes experimentally infected with Fasciola gigantica. The observations were compared with single therapeutic doses at 12.0 and 24.0 mg/kg body weight in cattle and buffaloes, respectively, prior to becoming experimentally infected. After receipt of triclabendazole by cattle and buffaloes at 0.83 and 3.0 mg/kg body weight, respectively, on a daily basis, both the animal species exhibited equilibrium between its absorption and disposition of its metabolites in plasma on day 4 and remained almost unchanged thereafter. The continuous subtherapeutic dosing of triclabendazole through urea molasses block at 0.83 mg/kg body weight in cattle and 3.0 mg/kg body weight in buffalo proved to be efficacious against mature liver flukes.