A client with a fungal infection of the toenail reports to the nurse that the client has been applying an over-the-counter (OTC) triple antibiotic ointment to the infection daily for two weeks without any improvement. Which action should the nurse take?

Instruct the client to obtain a prescription for oral terbinafine.

Advise the client to obtain a prescription-strength formulation of the ointment.

Suggest that the client use the ointment twice a day to be more effective.

Reassure the client that treatment of fungus-infected toenails often takes several months.