Comparative Pharmacology
Head-to-head clinical analysis: CONRAY 43 versus GASTROMARK.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CONRAY 43 versus GASTROMARK.
CONRAY 43 vs GASTROMARK
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Iodinated contrast agent that attenuates X-rays, enhancing vascular and tissue contrast during imaging.
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.
Intravenous: 0.5-1.0 mL/kg (20-43 mg I/kg) for CT; intra-arterial: 5-15 mL for selective studies; maximum single dose 150 mL.
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.
None Documented
None Documented
2 hours (normal renal function); prolonged to 20-40 hours in severe renal impairment (CrCl <10 mL/min).
Terminal elimination half-life: 3.1-3.5 hours; clinical context: supports rapid clearance from the body after imaging.
Renal: >90% via glomerular filtration; unchanged drug. Biliary: <1%. Fecal: negligible.
Renal: 23-31% as intact compound; fecal: 69-77% via biliary elimination; very little metabolism.
Category C
Category C
Radiographic Contrast Agent
Radiographic Contrast Agent