The causes of nausea and vomiting include indigestion, acute gastroenteritis, etc. There is no most effective treatment drug, and you need to choose appropriate drugs according to different causes, such as taking domperidone tablets, omeprazole and other treatments. 1. Dyspepsia: Dyspepsia can cause nausea and vomiting, and can be treated with drugs such as mitragynine pancreatic enzyme tablets and domperidone tablets. 2. Acute gastroenteritis: Acute gastroenteritis can also cause nausea and vomiting and other symptoms, and the drugs that can be taken include omeprazole, domperidone, mosapride and so on. 3. Stomach tumor: If you suffer from stomach tumor, nausea and vomiting may occur, the drugs you can use include Tegio tablets, capecitabine tablets, etc. Surgery should be carried out as soon as possible when the condition permits. The above drugs are prohibited for those who are allergic to them, and they should all be taken in accordance with the doctor’s instructions. If the symptoms of nausea and vomiting are serious, or persist without improvement, it is recommended to go to a regular hospital in time, after clarifying the cause of the disease, under the guidance of the doctor to carry out targeted treatment.