Oseltamivir can also be taken by adults, because in the clinic it is mainly used for the treatment of influenza A and B in adults, children aged 1 year and above, and also used for the prevention of influenza A and B in adults and adolescents aged 13 years and above. For the treatment of influenza A or B in adults, take 75mg twice a day for 5 days. For prevention of influenza in adults, 75mg is usually taken once a day for at least 10 days. Oseltamivir is contraindicated for those who are allergic to the components of the drug, and is prone to gastrointestinal reactions such as nausea, vomiting, and some patients may also experience bronchitis, insomnia, dizziness, as well as allergic reactions such as skin rashes, erythema, and other allergic reactions. Renal insufficiency, need to adjust the dose under the guidance of a physician. It is recommended that patients go to the hospital before the use of drugs, improve the auxiliary examination, in order to clarify the condition, the drug needs to be used under the guidance of a professional physician.