The medicine for H. pylori infection is irritating to the gastric mucosa, so it may cause nausea and vomiting, which can be relieved by drinking water, eating or temporarily stopping the medicine. 1. Drinking water: Drinking more water can protect the gastric mucosa to a certain extent and alleviate the stimulation of the gastric mucosa caused by Helicobacter pylori drugs. 2. Diet: Patients should try to eat a light diet during the medication period, and consume more food favorable to the gastrointestinal function, such as legumes, milk, etc., which is useful for repairing the damage to the gastric mucosa. 3. Temporarily stop taking the drug; if the patient’s nausea and vomiting adverse reaction has been very intense, can not be relieved by the above way, it is best to temporarily stop taking the drug under the doctor’s advice. The above is just a simple suggestion for the nausea and vomiting caused by taking Helicobacter pylori medication, it is best to go to the hospital as soon as possible to cooperate with the doctor to carry out professional examination and diagnosis and treatment.