A HIDA scan carries only a few risks. They include:
- Allergic reaction to medications containing radioactive tracers used for the scan
- Bruising at the injection site
- Radiation exposure, which is small
Tell your doctor if there's a chance you could be pregnant or if you're breast-feeding. In most cases, nuclear medicine tests, such as the HIDA scan, aren't performed in pregnant women because of potential harm to the fetus.