Long-term oral famotidine tablets can inhibit gastric acid secretion, clinical mainly used for chronic gastritis, gastric ulcer, but long-term application may produce insomnia, dizziness and other adverse reactions. Famotidine tablets is a kind of H2 receptor blocker, can inhibit the secretion of gastric acid, clinically mainly used in the treatment of chronic gastritis, gastric ulcer, reflux esophagitis, etc. Famotidine intravenous preparation can be used for gastrointestinal bleeding, such as gastric mucosal bleeding in the clinic, but need to pay attention to long-term use of famotidine tablets of the patient may produce insomnia, dizziness and other adverse reactions. If there is a need for famotidine, it is recommended to use the drug under the guidance of a doctor, not blindly self-medication to avoid adverse effects.