Oseltamivir is used for treatment is usually taken for 5 days, this product can be used in the treatment of influenza, etc., need to follow the doctor’s instructions for medication. Common dosage forms of Oseltamivir are capsules and granules. It is used for the treatment of influenza A and B in children over the age of 1 year, and for the prevention of influenza A and B in adults and those over the age of 13 years. The instructions state that the course of treatment for oseltamivir for influenza is 5 days and for prophylaxis at least 10 days. Adverse reactions to oseltamivir can be seen as nausea, vomiting, headache, allergic skin reactions, cardiac arrhythmia, gastrointestinal bleeding, convulsive seizures, and worsening of diabetes. It is contraindicated in people who are allergic to the product and its components. The drug should be used rationally under the supervision of a doctor.