Overview
11 DESCRIPTION EOVIST (gadoxetate disodium) injection is a paramagnetic gadolinium-based contrast agent for intravenous use. Gadoxetate disodium (Gd-EOB-DTPA) is a highly water-soluble, hydrophilic compound with a lipophilic moiety, the ethoxybenzyl group (EOB). EOB-DTPA forms a stable complex with the paramagnetic gadolinium ion with a thermodynamic stability of log KGdL=-23.46.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Gadoxetate is a paramagnetic molecule that develops a magnetic moment when placed in a magnetic field. The magnetic moment alters the relaxation rates of water protons in its vicinity in the body, leading to an increase in signal intensity (brightness) of tissues. Gadoxetate is selectively taken up by hepatocytes, resulting in increased signal intensity in liver tissue. 12.2 Pharmacodynamics In MRI, visualization of normal and pathological tissue depends in part on variations in the radiofrequency signal intensity that occurs with: Differences in proton density Differences of the spin-lattice or longitudinal relaxation times (T 1 ) Differences in the spin-spin or transverse relaxation time (T 2 ) When placed in a magnetic field, gadoxetate...
Indications
- 1 INDICATIONS AND USAGE EOVIST is indicated for use in magnetic resonance imaging (MRI) of the liver to detect and characterize lesions in adult and pediatric patients, including term neonates, with known or suspected focal liver disease. EOVIST is a gadolinium-based contrast agent indicated for use in magnetic resonance imaging (MRI) of the liver to detect and characterize lesions in adult and pediatric patients, including term neonates, with known or suspected focal liver disease. ( 1 )
Common Doses
- 0.1 mL
- 1 mL
- 2 mL
- 3 mg
Dosage
2 DOSAGE AND ADMINISTRATION Recommended dose is 0.025 mmol/kg actual body weight (equivalent to 0.1 mL/kg) administered by intravenous injection at 1 mL/sec to 2 mL/sec. ( 2.1 ) See Full Prescribing Information for administration and imaging instructions. ( 2.2 , 2.3 ) 2.1 Recommended Dose The recommended dose of EOVIST for adult and pediatric patients, including term neonates, is 0.025 mmol/kg actual body weight (equivalent to 0.1 mL/kg) administered intravenously at a recommended rate of 1 mL/sec to 2 mL/sec. 2.
Black Box Warning
WARNING: RISK ASSOCIATED WITH INTRATHECAL USE and NEPHROGENIC SYSTEMIC FIBROSIS Risk Associated with Intrathecal Use Intrathecal administration of gadolinium-based contrast agents (GBCAs) can cause serious adverse reactions including death, coma, encephalopathy, and seizures. EOVIST is not approved for intrathecal use [see Warnings and Precautions (5.1) ]. Nephrogenic Systemic Fibrosis GBCAs increase the risk for nephrogenic systemic fibrosis (NSF) among patients with impaired elimination of the drugs.
Contraindications
- 4 CONTRAINDICATIONS EOVIST is contraindicated in patients with history of severe hypersensitivity reactions to EOVIST [see Warnings and Precautions (5.3) ] . History of severe hypersensitivity reaction to EOVIST ( 4 )
Side Effects
- 6 ADVERSE REACTIONS The following clinically significant adverse reactions are discussed elsewhere in the labeling: Nephrogenic systemic fibrosis [see Warnings and Precautions (5.2) ] Hypersensitivity reactions [see Contraindications (4) and Warnings and Precautions (5.3) ] Most common adverse reactions (incidence ≥ 0.5%) are nausea, headache, feeling hot, dizziness, and back pain. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Bayer HealthCare Pharmaceuticals Inc. at 1-888-84-BAYER (1-888-842-2937) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.
Interactions
- 7 DRUG INTERACTIONS Serum Iron Test EOVIST contains caloxetate trisodium that can interfere with serum iron determination using complexometric methods (for example, ferrocene complexation method) and may result in falsely high or low values for up to 24 hours after the administration of EOVIST. Conduct serum iron tests either before or at least 24 hours following administration of EOVIST. Serum iron determination using complexometric methods (for example, ferrocene complexation method) may result in falsely high or low values for up to 24 hours.