The<unk>  is commonly prescribed in the hospital or emergency department to treat symptoms of dyspepsia. These symptoms include: belching, heartburn, chest pain, abdominal discomfort, abdominal bloating, nausea, loss of appetite, and flatulence. Dyspepsia itself is not an illness, rather it is an indicator of chronic underlying gastrointestinal issues such as peptic ulcer disease, gastro-esophageal reflux disease, h.pylori gastritis, gastroparesis, or upper gastrointestinal cancers. Dyspepsia can additionally be contributed to medications such as potassium supplements, NSAIDs, digitalis, iron, glucocorticoids, and colchicine, as well as lifestyle factors such as diet, stress, and cigarette smoking.
GI cocktail
EGS 
Enteroscopy
Gastric lavage
Pepscan
Endoscopy
Electrogastrogram
Impedance–pH monitoring