Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers). It works by decreasing the amount of acid your stomach makes. It relieves symptoms such as heartburn, difficulty swallowing, and persistent cough.
Domperidone improves symptoms of nausea, vomiting, bloating, and feeling of fullness. Domperidone is also used to prevent stomach problems such as nausea and vomiting associated with certain medications used to treat Parkinson's disease.