Comparative Pharmacology
Head-to-head clinical analysis: ISOPAQUE 280 versus MD 76.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ISOPAQUE 280 versus MD 76.
ISOPAQUE 280 vs MD-76
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
MD-76 is a contrast agent that contains iodine, which attenuates X-rays, thereby enhancing the contrast between vascular structures and surrounding tissues. It distributes in the extracellular fluid compartment and is excreted unchanged by glomerular filtration.
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.
IV: 50-100 mL per dose, administered as a bolus or infusion, not to exceed 3 mL/kg total dose.
None Documented
None Documented
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.
Terminal half-life: 1.5–2 hours; prolonged in renal impairment (up to 20 hours in anuria); clinical context: allows rapid elimination, suitable for diagnostic imaging
Renal: approximately 95% of the dose is excreted unchanged in the urine within 24 hours via glomerular filtration. Fecal: <5%; biliary excretion is negligible.
Renal: >95% unchanged via glomerular filtration; biliary/fecal: <5%
Category C
Category C
Radiocontrast Agent
Radiocontrast Agent