The plasma pharmacokinetics of iophenoxic and iopanoic acids in goat.
1. The comparative plasma pharmacokinetics of two organic iodine-containing compounds were evaluated in the goat for their suitability as markers in wildlife studies. 2. After oral administration of a single dose, the plasma elimination half-life for iopanoic acid was considerably more rapid (t1/2 of 1-2 days) than that of iophenoxic acid (t1/2 of 81 days). 3. Similar peak plasma concentrations were obtained after administration of iophenoxic acid (1.5 mg/kg) and iopanoic acid (25 mg/kg); however, the AUC0----infinity for iopanoic acid at doses of 25, 50, and 100 mg/kg were 201 +/- 39, 604 +/- 225, and 1292 +/- 721 (micrograms h/ml +/- SD), respectively, which were less than the value of 36,600 +/- 6387 for the oral administration of iophenoxic acid at 1.5 mg/kg. 4. Iophenoxic acid was chosen as a suitable marker because of its persistence at detectable concentrations in the plasma for 5 months.
Eason
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Forest Research Institute, Christchurch, New Zealand.
Frampton
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D000818:Animals; D015415:Biomarkers / Q000097:blood; D005260:Female; D006041:Goats; D007480:Iopanoic Acid / Q000031:analogs & derivatives* / Q000378:metabolism / Q000493:pharmacokinetics*
D015415:Biomarkers; C008160:iophenoxic acid; D007480:Iopanoic Acid