To perform a CT scan with contrast medium, the following tests are required:
AST, ALT. Blood sugar, Sodium, Potassium, Azotemia, Creatinemia, QSP, Bence-Jones Proteinuria, Electrocardiogram.
You will also need to be fasting for 6 hours from solid foods.
If you have allergies, you will need to contact your GP for any anti-allergy preparation.