Atrophic gastritis c3 may usually take about a month of medication. The time to take the medication can vary depending on the severity of the disease, H. pylori infection, the efficacy of the medication, the patient’s own condition and other factors. It is recommended that patients go to the hospital in time and actively cooperate with the doctor’s treatment. Atrophic gastritis is divided into open as well as closed under gastroscopy, and c refers to closed. According to the atrophic range, it is divided into c1, c2, c3. atrophic range is limited to the gastric sinus for c1, involving the range has reached the gastric angle, the gastric body, the gastric body of the small curvature for c2, the atrophic range has spread to the cardia for c3. Atrophic gastritis can be caused by Helicobacter pylori infection, non-steroidal anti-inflammatory drugs (NSAIDs) such as aspirin, alcohol, stress and other factors. Usually atrophic gastritis c3 usually requires about a month of medication. For Helicobacter pylori infection causing atrophic gastritis, medication is usually needed for 10 to 14 days, with a review two weeks after stopping the medication. Atrophic gastritis continues to develop and the presence of severe glandular atrophy or accompanied by intestinalization will increase the risk of cancer, patients should pay great attention to this and follow up regularly to prevent the occurrence of cancer. The duration of drug treatment is affected by the severity of the disease, the pathogen, the efficacy of the drug, and the patient’s own condition.