Comparative Pharmacology
Head-to-head clinical analysis: IOPAMIDOL 370 versus ISOPAQUE 280.
Peer-Reviewed Evidence
Head-to-head clinical analysis: IOPAMIDOL 370 versus ISOPAQUE 280.
IOPAMIDOL-370 vs ISOPAQUE 280
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Iopamidol is a nonionic, water-soluble, iodinated radiographic contrast agent that attenuates X-rays, thereby enhancing vascular and tissue contrast during imaging procedures. Its mechanism is physical rather than pharmacological, based on iodine content and osmolality.
Isopaque 280 (metrizoate) is an ionic, high-osmolar iodinated radiocontrast agent that attenuates X-rays by increasing the density of tissues where it distributes, thereby enhancing vascular and organ visualization during imaging.
1-2 mL/kg (370 mg iodine/mL) IV up to a maximum of 150 mL per procedure for contrast-enhanced CT; for angiography, dose varies by procedure.
Iohexol (ISOPAQUE 280) is administered intravenously, intra-arterially, or by other appropriate routes. Typical adult dose for CT imaging: 50–150 mL (concentration 280 mg I/mL) as a bolus or infusion. For angiography: 5–80 mL per injection, depending on procedure. Repeat doses may be given up to a total of 350 mL.
None Documented
None Documented
Terminal elimination half-life is approximately 2 hours (range 1.5-2.5 hours) in patients with normal renal function. Prolonged to 10-70 hours in patients with renal impairment, necessitating dose adjustment or avoidance.
Terminal elimination half-life is 1.5–2 hours in patients with normal renal function; prolonged to >10 hours in severe renal impairment, requiring dose adjustment.
Primarily renal; >90% of administered dose excreted unchanged in urine via glomerular filtration within 24-48 hours. Less than 1% excreted in feces or bile.
Renal: approximately 95% of the dose is excreted unchanged in the urine within 24 hours via glomerular filtration. Fecal: <5%; biliary excretion is negligible.
Category C
Category C
Radiocontrast Agent
Radiocontrast Agent