Oseltamivir can be used for the treatment of influenza, prevention of influenza, for different cases of different intervals, can be 12 hours, 24 hours. 1. Treatment of influenza: as a common drug for the treatment of influenza, the initial dose can choose to take 75mg per day, which can be taken twice a day, with an interval of 12 hours, for a total of 5 days. 2. Prevention of influenza: If used for the prevention of influenza, at creatinine clearance ≥ 60ml per minute, you can choose to take 75mg once daily, once a day, every 24 hours interval, a total of 10 days. When taking Oseltamivir, it is important to know that it is contraindicated for those who are allergic to the components of the drug, and should be used with caution if there is severe hepatic insufficiency, patients with dialysis, the dosage of the drug needs to be consulted with a physician, and it needs to be used with discretion in the period of pregnancy, breastfeeding, and childhood. Long-term use of the drug may cause a series of adverse reactions, such as drowsiness, fatigue, nausea, vomiting and so on, usually after stopping the drug will be relieved. If you need to take Oseltamivir, you should follow the doctor’s instructions.