A nurse is teaching a client who has a new prescription for nitrofurantoin. Which of the following Information should the nurse include in the teaching?

A. It is important to inform the client that nitrofurantoin can cause brown-colored urine as a harmless side effect and they should report this to their provider. B. Nitrofurantoin is an antibiotic used to treat urinary tract infections and does not provide relief for peripheral nerve pain. C. Nitrofurantoin should not be crushed because it can affect the medication's absorption and effectiveness. D. While coughing is not a common side effect of nitrofurantoin, if the client develops a cough, it could indicate a serious reaction, so it is important to notify the provider. However, the primary teaching point for nitrofurantoin is regarding the urine discoloration.