If a client was recently exposed to the flu, which medication might be appropriately prescribed for preventive treatment?

Oseltamivir is an antiviral medication that is commonly used for both the treatment and prevention of influenza. When a person is exposed to the flu, especially in a high-risk situation such as an outbreak or close contact with an infected individual, oseltamivir can effectively help reduce the likelihood of developing the illness. Its mechanism of action involves inhibiting the neuraminidase enzyme, which is crucial for the replication and spread of the influenza virus within the body. This makes oseltamivir a preferred choice for prophylactic treatment in exposed individuals, particularly in those who may be at higher risk for complications from the flu.

While other antiviral options may also have roles in treating influenza, such as zanamivir and baloxavir marboxil, their indications can vary. Zanamivir is delivered via inhalation and may have limitations for certain patients, particularly those with respiratory issues. Baloxavir marboxil is generally indicated for the treatment of acute uncomplicated influenza but is not typically used for prevention. Amantadine, while historically utilized for flu, is not recommended for current strains of influenza A and does not cover influenza B, which limits its usefulness in this context. Thus, prescribing oseltamivir for preventive treatment post-exposure aligns with