Nauzene Nauzene (sodium citrate dihydrate) is an OTC antacid that treats nausea related to an upset belly and overeating/ingesting. Talk to a Health care company for exact dosage before use in small children.Dopamine Antagonists Reglan (metoclopramide) is a dopamine antagonist used to treat nausea and vomiting due to GERD, diabetic gastroparesis, a