NUR 2407 - Pharmacology Exam A client with renal impairment who has been taking nitrofurantoin (Macrodantin) for a urinary tract infection telephones a nurse and describes the recent onset of "numbness and tingling" in the fingers and toes. What should the nurse instruct the client to do? A) Discontinue the drug and come in for further evaluation. B) Continue the drug and keep the hands and feet elevated when possible. C) Check the color of the extremities every 4 hours. D) Collect a urine sample and bring it to the clinic.