Erdostan is used for the treatment of acute and chronic bronchitis with mucous phlegm causing respiratory obstruction. 1. Erdostan is a mucoputrient solubilizing drug, which plays the role of mucoputrient solubilizing through hepatic bioconversion into active metabolites, and is mainly used for acute and chronic bronchitis with respiratory obstruction caused by thick sputum. 2. The common adverse reactions of Erdosteine are gastrointestinal reactions such as dyspepsia, nausea, vomiting, stomach pain, etc. Generally, the symptoms are mild and can be relieved on their own; however, if severe and persistent discomfort occurs, one should consult a doctor in time and be treated accordingly by a doctor. 3. During the use of the drug, should be avoided and strong cough suppressant drugs and make the bronchial secretion reduction of drugs used at the same time, to avoid drug interactions. In addition, patients with gastric or duodenal ulcers need to use this drug with caution, and children younger than 15 years of age need to be prohibited from using it. Erdolastine is a prescription drug, should be used under the guidance of a doctor, not blindly self-medication.