The nurse teaches a client who is starting nitrofurantoin for uncomplicated cystitis. Which statement shows correct understanding?
1I will take it with food, complete the course, and promptly report cough, shortness of breath, numbness, or jaundice.✓ Correct answer
2I will take it on an empty stomach and stop the medication if my urine becomes brown or dark yellow.
3I can use the medication for fever and flank pain because it reaches therapeutic levels in kidney tissue.
4I will continue taking each dose if a new cough or breathing difficulty develops and report it after the course.
Explanation
Nitrofurantoin is taken with food to improve absorption and tolerance, and the prescribed course is completed. Brown or dark yellow urine can be harmless. New cough, dyspnea, fever, peripheral numbness, or jaundice can indicate serious pulmonary, neurologic, or hepatic toxicity and requires prompt evaluation. Nitrofurantoin is used for lower urinary tract infection rather than suspected pyelonephritis, and renal function must be assessed.
Clinical reasoning Nitrofurantoin concentrates in urine but does not provide adequate tissue levels for pyelonephritis. Renal impairment can reduce efficacy and increase toxicity risk.
Decision rule Use nitrofurantoin for an appropriate lower urinary infection, take it with food, complete therapy, and escalate pulmonary, neuropathic, or hepatic symptoms promptly.