Stomach acid taking famotidine does not work may be related to the use of medication is not symptomatic, the dose of medication is not enough, there is no combination of drugs and other factors, it is recommended to change other drugs, increase the amount of medication or with timely gastroscopy, after the cause of the disease is clearly defined and other drugs combined with medication therapy. The use of medication should follow the doctor’s instructions. 1. The use of medication is not symptomatic: Famotidine is mainly used to treat esophagitis, gastroduodenal ulcer, reflux esophagitis, acute gastric mucosal lesions, and gastrinoma and other diseases, when the stomach acid is not caused by these diseases, the use of famotidine does not work, it is recommended that according to the cause of acidity of the stomach on the right medication. 2. insufficient dosage: the acidity of the stomach to take famotidine does not work may also be related to the dosage of the drug is not enough, you can increase the dosage of the drug under the guidance of the doctor. However, it is important to note that taking Famotidine may have adverse reactions such as increased pulse rate, increased blood pressure, headache, lack of appetite, allergies, etc. 3. No combination of drugs: Famotidine does not work, you can also carry out endoscopy to clarify the cause of the disease, such as gastritis caused by stomach acid can also be combined with proton pump inhibitors such as omeprazole, mucosal protection agents such as bismuth potassium citrate or gastrointestinal power drugs such as domperidone and other drugs for treatment. Stomach Acid taking Famotidine should be directed by a doctor, and Famotidine is contraindicated in patients with severe renal insufficiency, pregnant women and lactating women. Patients should also actively seek medical attention to clarify the cause of the disease and follow the doctor’s instructions to standardize treatment.