The dose of oseltamivir for children is calculated according to the child’s weight. If a 1 year old child does not weigh 15kg, the dose is 30mg twice a day. If the child weighs more than 15 kg, the dose is 45 mg twice a day, and the course of treatment is usually about 5 days. In addition, Oseltamivir must be supported by pathogenic evidence, such as a positive DNA test for influenza A and influenza B in the throat swab, before it is indicated for use. If it is just a simple nasal congestion and runny nose, this common cold is mostly caused by rhinovirus and parainfluenza virus, the application of oseltamivir is not very effective at this time, and will be prone to other adverse reactions such as abdominal pain and abdominal discomfort, which is completely unnecessary.