A nurse is reinforcing teaching with an adolescent client who has oral candidiasis and a new prescription for clotrimazole troche. Which of the following instructions should the nurse include in the teaching?

"Place the medication in the refrigerator after each use."

"Be sure to let the troche dissolve in your mouth for 15 minutes."

"Crush the troche before mixing it with applesauce."

"Stop the medication if white patches appear in your mouth."