A patient who is taking a monoamine oxidase inhibitor (MAOI) asks the nurse about the addition of St. John's wort to help with his depression. What would be the best response of the nurse?

C That is a great idea. Alternative therapies can be very helpful.' D You will feel better sooner if you include phenylalanine.' B Did you know that St. John's wort can raise your blood pressure dramatically?' A You will need to drink lots of water.'