View nitrofurantoin savings options available to you including Manufacturer Coupons, Rx Advantage Savings Card, Canadian Prescription Savings or nitrofurantoin Patient Assistance Program.

Programs are suitable for individuals who want to buy nitrofurantoin without insurance, with insurance or for those who are underinsured. You can pay as little as $0 per fill.*

Manufactured by various FDA-approved generic manufacturers.

*Applicable to Drug Coupons & Patient Assistance Programs

This content is intended for US audiences only

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Updated on 24 Apr 2024

Learn more about nitrofurantoin

What dosages is nitrofurantoin available in?

What dosages is nitrofurantoin available in?

nitrofurantoin is available as a 25 mg, 50 mg, and 100 mg oral capsule.

What is nitrofurantoin used for?

What is nitrofurantoin used for?

nitrofurantoin is a nitrofuran antibiotic that is used to treat urinary tract infections.

How does nitrofurantoin work?

How does nitrofurantoin work?

nitrofurantoin is a nitrofuran antibiotic. The medication collects in your urine. It kills bacteria in the urinary tract by damaging or blocking proteins the bacteria need to survive.

How do I take nitrofurantoin?

How do I take nitrofurantoin?

For adults, the typical dose is 50 mg to 100 mg by mouth four times a day with food. For children ages 1 month and older, the dose will depend on their body weight.

Is it safe for me to take nitrofurantoin?

Is it safe for me to take nitrofurantoin?

nitrofurantoin is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you have anuria, oliguria, or significant impairment of renal function, a previous history of cholestatic jaundice/hepatic dysfunction associated with nitrofurantoin, or pregnant at term (38-42 weeks gestation).

nitrofurantoin Common Side Effects

nitrofurantoin Common Side Effects

Common side effects of nitrofurantoin:

  • Nausea
  • Headache
  • Gas
  • Diarrhea
  • Vomiting
  • Upset stomach
  • Stomach pain
nitrofurantoin Serious Side Effects

nitrofurantoin Serious Side Effects

Serious side effects are rare with nitrofurantoin. Serious Side Effects Contact your healthcare provider immediately if you experience any of the following.

  • Severe allergic reaction: hives, rash, muscle aches, chills, fever, swelling of the lips or tongue, difficulty breathing
  • Severe diarrhea
  • Trouble breathing or new or worsening cough
  • Liver problems: stomach bloating, severe stomach pain with vomiting, yellowing of your skin or the whites of your eyes, dark urine
Effects of other drugs, drug classes and over-the-counter products on nitrofurantoin

Effects of other drugs, drug classes and over-the-counter products on nitrofurantoin

The following medications may interact with nitrofurantoin:

  • Antacids containing magnesium trisilicate, when administered concomitantly with nitrofurantoin, reduce both the rate and extent of absorption
  • Uricosuric drugs, such as probenecid and sulfinpyrazone, can inhibit renal tubular secretion of nitrofurantoin. The resulting increase in nitrofurantoin serum levels may increase toxicity, and the decreased urinary levels could lessen its efficacy as a urinary tract antibacterial
Who makes nitrofurantoin?

Who makes nitrofurantoin?

Various FDA-approved generic manufacturers

Is nitrofurantoin safe in pregnancy?

Is nitrofurantoin safe in pregnancy?

nitrofurantoin is contraindicated in pregnant patients at term (38-42 weeks gestation), during labor and delivery, or when the onset of labor is imminent. It is contraindicated in neonates under one month of age.


What to do if you missed your nitrofurantoin dose

The FDA's medical product safety reporting program for health professionals, patients and consumers.

Learn more about reporting side effects
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Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

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