Oseltamivir is an antiviral drug that inhibits the replication of influenza virus, reduces the pathogenicity of influenza virus, alleviates the symptoms of influenza, shortens the course of influenza and reduces complications. Oseltamivir has low toxicity, is less likely to cause drug resistance, and is effective when used early in the course of the flu. The dosage of oseltamivir is 75mg per dose, 2 times/day for 5 days. And be careful to take it early in the flu, it can significantly shorten the duration of the disease. At present, oseltamivir is one of the most promising drugs in the treatment of influenza. When you have a cold, you must pay attention to drink more water and take rest, and observe the change of body temperature, and recover your health as soon as possible with medication.