Comparative Pharmacology
Head-to-head clinical analysis: GASTROMARK versus ULTRAVIST 370.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GASTROMARK versus ULTRAVIST 370.
GASTROMARK vs ULTRAVIST 370
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.
Iodinated non-ionic contrast agent that attenuates X-rays due to its high iodine content (370 mg I/mL), enhancing vascular and tissue contrast during imaging. Does not bind to plasma proteins and has minimal pharmacological effects.
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.
Adult: IV administration of 370 mg iodine/mL at 1-1.5 mL/kg (370-555 mg I/kg) for CT; up to 300 mL total. Rate: 1-5 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: 2 hours (normal renal function); prolonged to up to 36 hours in severe renal impairment (CrCl <30 mL/min).
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%; negligible biliary excretion.
Category C
Category C
Radiographic Contrast Agent
Radiographic Contrast Agent