Risks
Barium does not move into the blood, so
allergic reactions are very rare.
Some
people gag while drinking the barium fluid. In rare cases, a person may choke
and inhale (aspirate) some of the liquid into the lungs.
There is
a small chance that the barium will block the intestine or leak into the belly
through a perforated ulcer. A special type of contrast material (Gastrografin)
can be used if you have a blockage or an ulcer.
There is always a
small chance of damage to cells or tissue from being exposed to any radiation,
even the low level of radioactive tracer used for this test.