FDA Approves Low-Dose Macrocyclic Contrast Agent for MRI
The macrocyclic gadolinium-based contrast agent has a recommended dose of 0.01 mmol/kg actual body weight.
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By
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Kathryn Wighton
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June 15, 2026
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Objective:
To announce the approval of AMBELVIST (gadoquatrane), a low-dose macrocyclic gadolinium-based contrast agent for MRI.
Approach:
Key Findings:
- AMBELVIST is the lowest-dose macrocyclic gadolinium-based contrast agent approved in the US.
- It delivers 60% less gadolinium than agents containing 0.1 mmol gadolinium/kg body weight.
- Increased lesion visualization was reported with combined precontrast and postcontrast MRI sets.
Interpretation:
Safety and effectiveness in pediatric patients were supported by studies in adults and pharmacokinetic data from 93 pediatric patients.
Limitations:
- AMBELVIST carries a boxed warning regarding risks associated with intrathecal administration and nephrogenic systemic fibrosis.
- It is contraindicated in patients with a history of severe hypersensitivity reactions to AMBELVIST.
Conclusion:
AMBELVIST provides an additional option for contrast-enhanced imaging while reducing gadolinium exposure.
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