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    Pharmacokinetics of meloxicam following intravenous administration at different doses in sheep
    (Wiley, 2024) Gungor, Huseyin; Corum, Orhan; Corum, Duygu Durna; Kumru, Alper Serhat; Yilmaz, Gokhan; Coskun, Devran; Coskun, Alparslan
    The aim of this study is to determine the pharmacokinetic change after intravenous administration of meloxicam at doses of 0.5, 1 and 2 mg/kg to sheep. The study was carried out on six Akkaraman sheep. Meloxicam was administered intravenously to each sheep at 0.5, 1, and 2 mg/kg doses in a longitudinal pharmacokinetic design with a 15-day washout period. Plasma concentrations of meloxicam were determined using the high performance liquid chromatography-ultraviolet, and pharmacokinetic parameters were evaluated by non-compartmental analysis. Meloxicam was detected up to 48 h in the 0.5 mg/kg dose and up to 96 h in the 1 and 2 mg/kg doses. As the dose increased from 0.5 to 2 mg/kg, terminal elimination half-life, and dose normalized area under the concentration versus time curve increased and total clearance decreased. Compared to the 1 mg/kg dose, it was determined that V(dss )decreased and C-0.083h increased in the 2 mg/kg dose. Meloxicam provided the therapeutic concentration of >0.39 mu g/mL reported in other species for 12, 48 and 96 h at 0.5, 1 and 2 mg/kg doses, respectively. These results show that meloxicam exhibits non-linear pharmacokinetics and will achieve unpredictable plasma concentrations when administered IV for a rapid effect at dose of >= 1 mg/kg in sheep.