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  • Title: Comparative pharmacokinetics of diminazene in lactating goats and sheep.
    Author: el Banna HA, Abo el-Sooud K, Soliman GA.
    Journal: Zentralbl Veterinarmed A; 1999 Feb; 46(1):49-57. PubMed ID: 10085767.
    Abstract:
    The pharmacokinetic aspects of diminazene aceturate were studied in lactating goats and sheep after single intravenous and intramuscular administrations of 3.5 mg/kg b.wt. Plasma and milk concentrations were determined by use of reversed phase high-performance liquid chromatography (HPLC) after ion-pair extraction. Following intravenous injection, the disposition of diminazene in goats and sheep conformed to a two-compartment model with rapid distribution and slower elimination phases. Values of (t1/2 beta) were obtained indicating a slower final disappearance of the drug from plasma of sheep (21.17 h) than in goats (16.39 h). Diminazene concentrations were maintained for more than 4 days in the plasma of goats and sheep. In both species of animals, diminazene was rapidly absorbed following intramuscular administration of 3.5 mg/kg b.wt. The peak plasma concentrations (Cmax) were 7.00 and 8.11 micrograms/ml and were attained at (Tmax) 0.92 and 1.12 hours in goats and sheep, respectively. The elimination half-life (t1/2el) of diminazene after intramuscular administration was shorter in goats (16.54 h) than in sheep (18.80 h). Systemic bioavailabilities (F%) of diminazene after intramuscular administration were 94.94% and 82.64% in goats and sheep, respectively. Diminazene could be detected in milk of goats and sheep within 10 min post-injection. Milk concentrations of the drug were lower in goats than in sheep and were detected for 5 and 6 days following both routes of administration, respectively.
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