Reglan (Metoclopramide) Dosage and Side Effects REGLAN is used to treat heartburn and ulcers in people with gastroesophageal reflux disease (GERD). REGLAN can also help people with diabetes who have a condition known as gastroparesis (poor emptying of the stomach). It can also be used to treat nausea in certain patients and … Continue reading Reglan (Metoclopramide)