With the outbreak of epidemic, oseltamivir seems to be a very popular topic. So today, Dr. Zhang is here to introduce how to use oseltamivir in a short space. First of all, we need to make sure that you have an epidemic, not an ordinary cold (upper respiratory infection). Oseltamivir is only effective against influenza A and B (most common), but not against the common cold. After that, Dr. Zhang will talk about the difference between the two in detail. Secondly, let&;s take a look at the usage and dosage recommended by the manufacturer: ① If it is used for the treatment of epidemic fever, oseltamivir should be taken from the second day after symptoms appear. The recommended dosage: adults and adolescents (over 13 years old) should take 75 mg each time, twice a day, and take it continuously for 5 days. ② If it is used to prevent epidemic fever, adults and teenagers (over 13 years old) can take 75 mg once a day for 7 days, which can play a protective role for 6 weeks. The longer they use oseltamivir, the longer the protection time will be. The above is about the use of oseltamivir, please follow the instructions.