A patient is receiving gentamicin once daily. A nursing student asks the nurse how the drug can be effective if given only once a day. The nurse explains drug dosing schedules for aminoglycosides. Which statement by the student indicates a need for further teaching?

a."Gentamicin has a longer half-life than other aminoglycosides."
b."Large doses given once daily yield higher peak levels."
c."The postantibiotic effect lasts for several hours."
d."There is less risk of ototoxicity and nephrotoxicity with large daily doses."