Gastric lavage is a very common clinical treatment. The price of gastric lavage is not high, around 40-50 yuan, and additional materials such as gastric tubes and treatment fees are charged, around 100 yuan. The price may vary from hospital to hospital, so consult your local hospital for details. Gastric lavage is the filling of the stomach cavity with a certain composition of liquid and repeated flushing through the gastric lavage machine, thus it can be used to treat acute poisoning such as acute organophosphorus poisoning, sleeping pill poisoning, etc. It can also be used to clean the gastrointestinal cavity before surgery. Patients presenting with organophosphorus pesticide poisoning or other poisoning should have their stomachs lavaged early, and it is most effective within 4-6 hours of taking the poison. However, if the patient has poor gastrointestinal function, slow gastrointestinal peristalsis, or takes more poison, taking poison may cause slowing of gastrointestinal peristalsis, and gastric lavage can still be considered after more than 6 hours. Gastric lavage can remove the poison to avoid further aggravation of poisoning.