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Omnipaque in CT – use of

Patient information A-Z

This information is for all patients prescribed Omnipaque before or during CT examinations.

Your doctor has arranged for you to have a CT scan and has prescribed Omnipaque as part of the procedure. Omnipaque is a drug, containing iodine, which functions as a contrast medium to highlight areas to be investigated. It is used to show clearly on CT scans the area your doctor wants to investigate.

How do I take Omnipaque?

  • Dilute 5mls of Omnipaque in 300mls of water.
  • Take the required amount of drinks over the number of days as detailed in your appointment letter.
  • You may also be given more Omnipaque to drink 30 minutes before your scan when you arrive in the department. Your appointment letter will tell you how early to arrive for your appointment.

Does Omnipaque have any side effects?

All drugs may cause some side effects. Most people who receive Omnipaque cope well and experience few, if any, side effects. It is important to note any new symptoms after taking Omnipaque and discuss them with the radiographer. The department’s contact details are at the bottom of the page.

Some people may experience nausea and vomiting, diarrhoea, skin rashes and very rarely an anaphylactic/allergic type reaction. If this happens to you, stop taking the Omnipaque and contact your GP or the CT department.

Can I take other medicines with Omnipaque?

  • Continue to take your regular medication as prescribed by your doctor unless otherwise informed.

Is there any situation when I shouldn’t take Omnipaque?

  • If you are hypersensitive to iodine
  • If you are, or think you may be, pregnant

If you are subsequently tested for a thyroid disorder always tell your doctor. Omnipaque may make the test or treatment less effective for several weeks.

Contact/further information

If you have any comments, queries or feedback regarding the procedure or this information leaflet, then please do not hesitate to contact the CT department on 01223 216779.

We are smoke-free

Smoking is not allowed anywhere on the hospital campus. For advice and support in quitting, contact your GP or the free NHS stop smoking helpline on 0800 169 0 169.

Other formats

Help accessing this information in other formats is available. To find out more about the services we provide, please visit our patient information help page (see link below) or telephone 01223 256998.

Contact us

Cambridge University Hospitals
NHS Foundation Trust
Hills Road, Cambridge

Telephone +44 (0)1223 245151