Frequent belching after taking medication may be due to drug reaction, chronic gastritis, gastric ulcer and other reasons. 1. Drug reaction: some drugs will appear after taking gastrointestinal reaction, causing belching, nausea and other symptoms, generally stop using the drug, can be gradually recovered. 2. Chronic gastritis: gastric mucous membrane damage, stimulation of the gastric mucous membrane after taking drugs to aggravate the symptoms, causing belching, acid reflux, nausea and other discomforts. 3. Gastric ulcer: gastric mucosal protective barrier is destroyed, gastric mucosal ulcer surface after taking the drug on the gastric mucosal stimulation symptoms, can also cause frequent belching, nausea, acid reflux, heartburn and other symptoms. Frequent belching after taking medication for the elderly, there may be intestinal obstruction, gastric cancer and other reasons, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for treatment.