A gastrointestinal<unk> , (also known as a<unk>  or gastric<unk> , is a mixture of medications used to treat symptoms of dyspepsia The<unk>  generally contains a mixture of viscous lidocaine, an antacid, and an anticholinergic. The<unk>  is commonly prescribed in the hospital or emergency department, and has been used to help distinguish chest pain as either gastrointestinal or cardiac. While it has been widely used in the treatment of dyspepsia, studies have suggested that the<unk>  is only as effective as antacids alone. The<unk> " does not refer to a specific product. Rather, it refers to a mixture of viscous lidocaine, an antacid, and an anticholinergic. Viscous lidocaine works as an anesthetic to numb pain in the throat, esophagus, and stomach. Antacids work to neutralize stomach acid. Anticholinergics work to ease symptoms that accompany dyspepsia including nausea, vomiting, and abdominal cramping.
GI cocktail
EGS 
Enteroscopy
Gastric lavage
Pepscan
Endoscopy
Electrogastrogram
Impedance–pH monitoring