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The upper GI endoscopy is a safe test, but there is always a small risk with procedures of this kind.
Possible problems include bleeding, tearing of the bowel and an allergic reaction to sedative drugs. These complications are rare (less than one in every 1,000 tests) but those affected may need urgent medical treatment.
There is a small risk that the test could damage crowned teeth or dental bridge work. Tell the doctor or nurse if you have these.
