Comparative Pharmacology
Head-to-head clinical analysis: GASTROMARK versus OMNIPAQUE 210.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GASTROMARK versus OMNIPAQUE 210.
GASTROMARK vs OMNIPAQUE 210
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Gastromark (ferumoxsil) is an oral superparamagnetic contrast agent used in MRI. It contains iron oxide particles that create local magnetic field inhomogeneities, reducing T2* signal in the gastrointestinal tract, thereby improving visualization of abdominal organs by darkening the bowel lumen.
Radiopaque contrast agent that contains iodine, which attenuates X-rays and provides radiographic visualization of vascular structures and organs. It does not have a pharmacological mechanism of action.
Orally, 30-60 mL of a 1% suspension (300-600 mg iron) diluted in water or juice, given 12-24 hours prior to MRI examination; may be repeated if necessary.
Intravascular administration: 50-150 mL (10-30 g iodine) as bolus or infusion, based on procedure (CT, angiography, urography). Intravenous infusion for CT: 100-200 mL at 1-3 mL/sec.
None Documented
None Documented
Terminal elimination half-life: 3.1-3.5 hours; clinical context: supports rapid clearance from the body after imaging.
Terminal elimination half-life: 1-2 hours in patients with normal renal function; prolonged in renal impairment (up to 30 hours in severe cases). In neonates, half-life is 6-12 hours due to immature renal function.
Renal: 23-31% as intact compound; fecal: 69-77% via biliary elimination; very little metabolism.
Renal: ~95% unchanged within 24 hours via glomerular filtration; biliary/fecal: <5%
Category C
Category C
Radiographic Contrast Agent
Radiographic Contrast Agent