Risks and precautions Anti-cholinergics, which are used for gastrointestinal symptoms, should not be used if you have severe cardiac disorders or glaucoma. No changes necessary. No changes necessary. When it reaches the rear of your throat, you will probably cough or gag. Lubricant on the tubing has an unpleasant taste.
Discomfort disappears when the test is finished.
Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. Relax as much as possible. Lubricated tube is passed through the nose, down and back into the throat. When the tube causes gagging, bend forward and sip water or ice chips. The tube is advanced through the esophagus and stomach to the duodenum.