The nurse reinforces teaching to a client prescribed isoniazid, rifampin, ethambutol, and pyrazinamide to treat active tuberculosis. Which of the following instructions associated with the adverse effects of rifampin is most important for the nurse to include?

D You can stop taking the medications as soon as one sputum culture comes back normal B Take acetaminophen every 6 hours for drug-associated joint pain while taking this medication C Wear eyeglasses instead of soft contact lenses while taking this medication A Notify the health care provider if your urine is red