Doctors will often ask their patients to fast for at least four hours before a HIDA scan. Some individuals may be able to drink clear liquids during this time. Patients should let the radiologist know if they are pregnant and provide a list of medications they are taking. Individuals undergoing this procedure should let the staff know if they've had a recent barium X-ray or taken a medication containing bismuth, as these can interfere with the results. Medical staff will request that they remove any jewelry or metal accessories before the scan.

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