Can oseltamivir prevent influenza A?

Feb 25, 2025 Source: Cainiu Health
Disease description:

Hello doctor, I heard that oseltamivir can prevent influenza A. Is that true? Recently, influenza A has been quite severe at my child's school, and I would like to know if I can give my child oseltamivir for prevention.

Doctor's answer (1)
Dr. Ren Yi

Influenza A refers to Influenza type A. Oseltamivir is available in various formulations including suspension and capsules. Oseltamivir can be used to prevent Influenza A under certain circumstances.

Oseltamivir is a neuraminidase inhibitor that can inhibit the spread of the influenza virus in the human body, thereby serving both therapeutic and preventive purposes. Individuals who have had close contact with a person infected with Influenza A can reduce their risk of infection to some extent by taking oseltamivir within 48 hours after exposure. People in high-risk environments for Influenza A outbreaks, such as schools and nursing homes, may also benefit from taking oseltamivir as a preventive measure.

However, it is not recommended to give oseltamivir to children casually or without medical supervision for the prevention of Influenza A. Oseltamivir has strict requirements regarding the appropriate population for use and dosage, and it may cause some side effects such as gastrointestinal reactions including nausea, vomiting, and abdominal pain, as well as possible neuropsychiatric symptoms. Without professional evaluation and guidance from a doctor, taking the medication blindly may pose unnecessary risks.

If you are concerned about your child contracting Influenza A, it is recommended to consult a doctor first. The doctor can determine whether oseltamivir should be used for prevention based on the specific situation.