Answer
Its iodine load can aggravate hyperthyroidism and may cause hypothyroidism in exposed neonates, particularly preterm babies. It can also temporarily interfere with thyroid radioisotope procedures.
Sources for this answer
- Gastrografin — Current selected SmPCemc · Summary of Product Characteristics
- Urografin 150 for Infusion — Current selected SmPCemc · Summary of Product Characteristics