Effect of Early Antiviral Therapy on Duration of Cough in Flu Patients
Effect of Early Antiviral Therapy on Duration of Cough in Flu Patients
This study mainly focused on the effect of early antiviral treatment on the duration of cough
 in influenza patients.investigators conducted an early investigation of patients with
 positive influenza virus and asked whether patients used antiviral drugs in the early stages.
 According to the use of drugs, patients were divided into oral oseltamivir group, oral lotus
 phlegm group and other groups, and investigators will collected Inspection information and
 medication status,during the treatment period of patients.
Cough is a common symptom of respiratory diseases and helps to clear respiratory secretions
 and harmful factors, but frequent severe coughing has a serious impact on the patient's work,
 life and social activities. Upper respiratory tract viral infection is a common cause of
 coughing. Many patients have a long duration of cough after suffering from flu. Cough can
 last for several weeks, and most often have irritating dry cough or a small amount of white
 mucus sputum. This type of cough is also often referred to as "subacute cough" or
 "post-infection cough." The mechanisms that cause this cough have not been fully elucidated,
 and the effect of conventional treatment is not good, and chest imaging has no obvious
 abnormalities. The use of large amounts of antibiotics is ineffective or ineffective.
 Antihistamine H1 receptor antagonists and central antitussives are often only effective or
 ineffective in the short term. The effects of various bronchodilators and even hormone drugs
 are not clear. Due to the poor efficacy of multiple treatments, patients are repeatedly
 subjected to various tests, which not only increases the pain but also aggravates the
 economic burden.

 Therefore, it is necessary to further clarify the causes and treatment measures of
 post-influenza cough patients.
Inclusion Criteria:

 For patients with flu-free flu, cough for at least one week.

 1. In line with the flu etiological diagnostic criteria: According to the guidelines set
 by the National Health and Health Committee, the diagnosis is based on etiological
 screening methods or confirmed methods; ages 18 to 70 years.

 2. There are no influenza complications such as acute lower respiratory tract infection,
 tonsillitis, sinusitis, otitis media, myocarditis, etc.

 3. It is usually healthy and there are no chronic underlying diseases such as
 hypertension and diabetes.

 4. Treating with cough as the main symptom, the cough lasts for at least one week and the
 chest radiograph is normal.

 5. Signed informed consent.

 Exclusion Criteria:

 1. Suspected flu patients who have not received the flu etiology test;

 2. There is a clear comorbid disease (combined with other sites of acute bacterial or
 viral infections);

 3. There is a clear cough caused by other reasons;

 4. With severe liver and kidney dysfunction;

 5. Pregnant women.