A client who is preparing for discharge to home receives a prescription for ferrous sulfate. Which information should the practical nurse (PN) reinforce with the client before discharge?

A. Note that the stool color will be pink tinged: Ferrous sulfate commonly causes dark green or black stools, not pink. B. Drink milk with any gastrointestinal upset: Milk decreases iron absorption and should be avoided with iron supplements. C. Take with foods that are high in vitamin C: Vitamin C enhances iron absorption and is recommended. D. Use the medication for no more than 21 days: Iron therapy typically continues for several months until stores are replenished, not just 21 days.