Overview

Radionuclide instruction card

If you have had an I-125 implant as part of your cancer treatment, you will be given a radionuclide instruction card.

The card carries important information about your implant, and some useful phone numbers. You should carry it with you for two years after surgery. After 2 years you can destroy the card.

Please do not make copies of your card. Please contact us for a replacement card or leaflet if you need one.

An image of the radionuclide instruction card. It has the Guy's and St Thomas' logo, a lime-green border, space for patient details, and a yellow and black radiation hazard logo

Medical treatment

You must show it to any healthcare professional who treats you during this time, as it contains important medical information. Before any treatment is discussed, it's important that they know about your implant.

Your next of kin should know about the card so that they can act on the information, in the event of an unforeseen illness or death.

Other uses of the card

The card can also be useful when travelling away from home. Lots of airports, seaports, other transport systems and public buildings now have radiation detectors installed. These are very sensitive and might respond to your implant even though the radiation levels are very low. You can use your card to explain why this has happened.

If there are any problems, please call us and ask for someone on the emergency radiation contact list. It might be useful to keep this information with you, as well as the card, if you are travelling abroad.

Resource number: 3508/VER5
Last reviewed: February 2026
Next review due: February 2029

Do you have any comments or concerns about your care?

Contact our Patient Advice and Liaison Service (PALS)

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