A nurse is providing teaching to a client who has a new prescription for rifampin. Which of the following statements should the nurse include in the teaching?

A. Rifampin can discolor body fluids, including tears, which may stain soft contact lenses. B. Rifampin is typically taken once daily but not necessarily at bedtime unless directed. C. Rifampin can decrease the effectiveness of oral contraceptives; clients should use additional contraception. D. Orange discoloration of urine and other body fluids is a harmless but expected effect of rifampin.