A nurse is reinforcing teaching with a client who has a new prescription for fexofenadine tablets to treat seasonal allergies. Which of the following information should the nurse include?

A. While staying hydrated is important, there is no specific requirement for a liter of fluid with fexofenadine. B. Fexofenadine can cause drowsiness in some individuals, so caution with activities requiring mental alertness, such as driving, is advised. C. Fexofenadine should be taken with water, not juice, as juice may affect its absorption. D. Magnesium-containing antacids may decrease the absorption of fexofenadine and should be avoided.