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Nitrofurantoin

Also sold as Nitrofurantoin, NITROFURANTOIN

Medicine summary · from official FDA labels · Oct 19, 2026

5 recalls on record — a recall affects specific batches; check with your pharmacist.

What it’s used for

Nitrofurantoin oral suspension is indicated in adults and pediatric patients 1 month of age and older for the treatment of urinary tract infections due to susceptible strains of Escherichia coli, Enterococcus species , Staphylococcus aureus, Klebsiella species and Enterobacter species. Limitations of Use Nitrofurantoin oral suspension is not indicated for the treatment of pyelonephritis or perinephric abscesses [see Warnings and Precautions (5.

How to take it

Adult Patients: 50 mg to 100 mg four times a day - the lower dosage level is recommended for uncomplicated urinary tract infections. (2.

Important warnings

5 WARNINGS AND PRECAUTIONS • Hypersensitivity Reactions: Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients receiving nitrofurantoin oral suspension. If signs and symptoms of a hypersensitivity reaction occurs, immediately discontinue nitrofurantoin oral suspension.

Common side effects

The following clinically significant adverse reactions are discussed in more detail in other sections of the labeling: • Hypersensitivity Reactions [see Warnings and Precautions (5. 1) ] • Pulmonary Reactions [see Warnings and Precautions (5.

Interactions

Antacids: Decreased absorption of nitrofurantoin.

If pregnant or breastfeeding

8.

Forms & strengths

25 MG / 75 MG Oral Capsule · 100 MG Oral Capsule · 100 MG Oral Tablet · 5 MG/ML Oral Suspension · 50 MG Oral Tablet · 25 MG Oral Capsule · 50 MG Oral Capsule · 10 MG/ML Oral Suspension

Questions to ask your doctor or pharmacist

  • Is this the right medicine for my condition, and how long should I take it?
  • What side effects should I watch for, and which need urgent attention?
  • Does this interact with my other medicines, supplements, or alcohol?
  • What should I do if I miss a dose or take too much?