The nurse is planning to educate a client who has been prescribed oseltamivir. What information should the nurse plan to include? Select all that apply.

A. Oseltamivir is prescribed annually to prevent influenza: Oseltamivir is an antiviral treatment or post-exposure prophylaxis, not a routine annual preventive vaccine. Influenza prevention is primarily achieved through annual influenza vaccination. B. Oseltamivir can cause gastrointestinal upset: Common adverse effects include nausea, vomiting, and abdominal discomfort. Taking the medication with food can help reduce these symptoms and improve tolerability. C. Oseltamivir can be prescribed following influenza exposure: Oseltamivir may be used for post-exposure prophylaxis in high-risk individuals to prevent the onset of influenza. Early initiation after exposure is critical for effectiveness. D. Oseltamivir can help to speed up recovery from influenza: When started within 48 hours of symptom onset, oseltamivir can reduce the duration and severity of influenza symptoms by inhibiting viral neuraminidase. E. Oseltamivir should be administered via inhalation: Oseltamivir is administered orally in capsule or liquid form. Inhalation is not a route for this medication; this is a common misconception with other antivirals like zanamivir.