A nurse is teaching a client who is beginning a course of metronidazole to treat a sexually transmitted infection (STI). Which of the following responses by the nurse should be included in the client education of this medication?

“you will not need to complete the prescribed course of antimicrobial therapy once your manifestations resolve.”

“you will need to complete the prescribed course of antimicrobial therapy. even if manifestations can resolve before the full course is completed."

“you can continue with unprotected sexual intercourse while you are prescribed with this medication.”

“There is no effect on hormonal contraceptive with this medication. since this medication is used to treat viral infections only."