The generic name of morpholine is domperidone, which should be used with caution during pregnancy, and if there is stomach distension and other discomforts, consult a doctor promptly. Domperidone is used to treat indigestion, bloating, belching (burping), nausea, vomiting and other discomforts. Animal studies have shown that it can produce reproductive toxicity, and there is limited experience with its use in pregnant women, so it is recommended that it be used with caution. Therefore, pregnant women with symptoms such as gastric distension need to go to the hospital in time, and the physician will carefully weigh the pros and cons before deciding whether or not to use the drug. In addition, domperidone may produce dry mouth, drowsiness, headache, breast milk overflow and other adverse reactions, prohibited for mechanical obstruction of the digestive tract, perforation, bleeding, prolactinoma, pheochromocytoma, breast cancer, moderate to severe hepatic insufficiency, allergy and so on. Pregnant women need to be closely observed when using the drug.