Gastrin 17 less than 1ng/L may suggest diseases such as atrophic gastritis, gastric ulcer, gastroesophageal reflux disease, etc. Suitable medications can be selected for treatment according to the condition, such as acid-suppressing medications, gastric mucosal protectants, and pro-dynamic medications. If there is Helicobacter pylori infection, eradication of Helicobacter pylori treatment is also needed. 1. Acid-suppressing drugs: patients with atrophic gastritis, gastric ulcer, gastroesophageal reflux disease, etc. can take acid-suppressing drugs, such as Ranitidine, Cimetidine, etc., according to the doctor’s prescription if they have gastric mucous membrane erosion and acid reflux. 2. Gastric mucosal protective agent: If the gastric mucosal erosion or symptoms are obvious, you can take colloidal secret, aluminum sulfate, Rebapatite and other gastric mucosal protective agents to prevent and treat gastric mucosal damage. 3. Prokinetic drugs: patients with atrophic gastritis and gastroesophageal reflux disease can also take prokinetic drugs, such as domperidone and mosapride, if they have symptoms such as early satiety and epigastric fullness. 4. Treatment for eradication of Helicobacter pylori: If Helicobacter pylori infection exists, quadruple therapy, such as omeprazole, bismuth potassium citrate, clarithromycin, amoxicillin, etc., is also needed. Patients who present with gastrin 17 less than 1ng/L should go to the local hospital in time and choose the appropriate drugs for treatment under the guidance of professional physicians.