Upper gastrointestinal (GI) pan glucosamine contrast acts as a contrast medium so that the upper GI tract can be clearly visualized to see the presence and location of lesions. Pantethine is an iodine contrast agent. It is mainly used for various kinds of imaging such as angiography and CT enhancement scanning. Before the contrast examination, the examinee is given the contrast agent so that the examined area can be clearly visualized, so that it is possible to see clearly whether there is any foreign body in the upper gastrointestinal tract and estimate the location of the foreign body, and to see whether there is any lesion in the esophagus and the location of the lesion. The contrast medium is prone to adverse reactions such as itching and hives, which can be life-threatening in severe cases, and a skin test is required to avoid the occurrence of adverse reactions.