Nitrofurantoin — Uses, Dosage, Side Effects & Safety
Drug class: Antibiotic (Nitrofuran derivative)
Overview
Nitrofurantoin is an antibiotic used primarily to treat and prevent urinary tract infections (UTIs) caused by susceptible bacteria. It works by interfering with the bacteria's ability to produce proteins and other essential molecules, ultimately killing the bacteria and stopping the infection. This medication is effective against most common UTI-causing organisms, especially Escherichia coli. It is not suitable for treating infections outside the urinary tract. Patients should take nitrofurantoin exactly as prescribed and complete the full course, even if symptoms improve early, to prevent recurrence or resistance. Key points: Take with food or milk to reduce stomach upset, and inform your healthcare provider about any kidney problems or allergies before starting this medication.
Therapeutic uses
- Urinary tract infections (acute, uncomplicated)
- Urinary tract infections (prophylaxis)
- Cystitis
Common side effects
- Nausea
- Vomiting
- Diarrhea
- Headache
- Dizziness
- Peripheral neuropathy
- Pulmonary fibrosis
- Hepatotoxicity
Frequently Asked Questions about Nitrofurantoin
What is nitrofurantoin used for?
Nitrofurantoin is primarily used to treat and prevent urinary tract infections (UTIs) caused by susceptible bacteria. It is not effective for infections outside the urinary tract.
How quickly does nitrofurantoin work?
Most people begin to feel better within 1–2 days of starting nitrofurantoin, but it is important to complete the full course as prescribed.
Can I take nitrofurantoin if I have kidney problems?
Nitrofurantoin is not recommended for patients with severe kidney impairment (creatinine clearance
Is nitrofurantoin safe during pregnancy?
Nitrofurantoin may be used during pregnancy except in the last few weeks (at term), when it is generally avoided due to risk of hemolytic anemia in the newborn.
What should I do if I develop a rash or breathing problems while taking nitrofurantoin?
Stop taking the medication and seek immediate medical attention, as these may be signs of a serious allergic reaction.
Can I drink alcohol while taking nitrofurantoin?
Alcohol does not directly interact with nitrofurantoin, but it may worsen side effects such as stomach upset. Consult your healthcare provider for personalized advice.
What foods or medicines should I avoid while taking nitrofurantoin?
Avoid antacids containing magnesium trisilicate and inform your doctor about all other medications you are taking to prevent interactions.
Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.