A school nurse is providing teaching to an adolescent about levonorgestrel contraception. Which of the following information should the nurse include in the teaching?

A You should take the medication within 72 hours following unprotected sexual intercourse. G A C If you don't start your period within 5 days of taking this medication, you will need a pregnancy test. B You should avoid taking this medication if you are on an oral contraceptive. D One dose of this medication will prevent you from becoming pregnant for 14 days after taking it.