There are many methods to induce vomiting, such as drugs and physical stimulation. Emesis is used for those who are conscious and can cooperate, coma, convulsions, taking putrefactive agent is prohibited, can use tongue depressor, chopsticks and other stirring touch the pharyngeal arch and posterior pharyngeal wall to make them vomit, this method is simple and easy to implement, effective quickly, if the food is too thick can not vomit, vomit net, the patient can be asked to drink the appropriate amount of warm water or salt water, and then prompt vomiting, so repeatedly until the vomit liquid becomes clear. There is also a gastric tube inserted from the nasal or oral cavity, through the esophagus to reach the stomach, first suck out the poison after the injection of gastric lavage, and the stomach contents to eliminate the purpose of poison. Patients who have taken poison orally should be treated with gastric lavage by inserting a gastric tube as soon as possible when possible, which is helpful to prevent the absorption of toxins.