For most people
Gadolinium contrast has been used for many years. Nausea, a brief headache or a cold feeling at the injection site are the effects people actually report. They settle. A severe allergic reaction is rare, and the team watches for it.
Who needs a conversation first
- People with severely reduced kidney function. Contrast can usually be avoided or the dose adjusted. Bring recent blood results if you have them.
- Anyone who reacted to MRI contrast before. Say so even if it was years ago.
- Pregnancy. Contrast is avoided unless a specialist decides the scan cannot answer the question without it.
Tiny amounts of gadolinium can remain in the body. Regulators still allow its use when the pictures change a decision. It should not be given for curiosity. If you are unsure why contrast was added, ask before the cannula goes in.