<unk> (injection) is a dopamine antagonist that is FDA approved for the treatment of diabetic gastroparesis (diabetic gastric stasis), prevention of nausea and vomiting associated with emetogenic cancer chemotherapy, prevention of postoperative nausea and vomiting, small bowel intubation, radiological examination. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include body fluid retention, nausea, vomiting, asthenia, headache, somnolence, fatigue.
Metoclopramide 
Omeprazole
Rabeprazole
Lansoprazole
Esomeprazole 
Pantoprazole 
Hexetidine
Esomeprazole sodium