<unk> (oral) is an antiemetic that is FDA approved for the treatment of symptoms due to gastroesophageal reflux and diabetic gastroparesis. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include headache, nausea, vomiting, fatigue, and somnolence.
Metoclopramide 
Omeprazole
Rabeprazole
Lansoprazole
Esomeprazole 
Pantoprazole 
Hexetidine
Esomeprazole sodium