A client with symptoms of influenza that started the previous day asks the clinic nurse about taking oseltamivir to treat the infection. Which response should the nurse provide?

Advise the client that once symptoms occur it is too late to receive an influenza vaccination.

Explain to the client that antibiotics are not useful in treating viral infections such as influenza.

Refer the client to the healthcare provider at the clinic to obtain a medication prescription.

Instruct the client that over-the-counter medications are sufficient to manage influenza symptoms.