Nitrofurantoin

Nitrofurantoin
4.219 ratingsReviews
Generic:
Nitrofurantoin
Indications:
urinary tract infections
Analogs:
Macrobid Macrodantin Furadantin Trimethoprim Co Trimoxazole Fosfomycin Pivmecillinam Cephalexin Amoxicillin Clavulanate Cefpodoxime Ciprofloxacin
Across the UK market, nitrofurantoin is frequently associated with brands such as Furadantin or Macrobid rather than Nitrofurantoin. The active ingredient is the same, and the intended use is similar. Order online today at a great price.
In stock: 11 packs
AdultsPregnancyAllergiesDiabetesBreastfeedingChildrenDriving

Dosages

Nitrofurantoin 50 mg

Quantity Price per tablet You save Total price
100 £0.90 - £90.38
200 £0.77 £27.41 £153.35
300 £0.72 £55.56 £215.57
400 £0.69 £83.71 £277.80
500 £0.68 £111.12 £340.77
600 £0.67 £142.23 £400.03

Nitrofurantoin 100 mg

Quantity Price per tablet You save Total price
100 £0.87 - £87.41
200 £0.75 £25.19 £149.64
300 £0.70 £53.34 £208.91
400 £0.67 £82.97 £266.69
500 £0.65 £109.64 £327.43
600 £0.65 £132.60 £391.88

Manufacturers

Almatica PharmaAspen Pharmacare AustraliaMercury Pharma Group

Payment & Delivery

Package Example

Your order is carefully packed and is dispatched within 24 hours. Here is what a typical package looks like.

Sized like a regular personal letter (approximately 24x11x0.7 cm), with no indication of what is inside.

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Delivery Times
Delivery MethodEstimated delivery
Express Free for orders over £222.24Estimated delivery to the UK: 4-7 days
Standard Free for orders over £148.16Estimated delivery to the UK: 14-21 days
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Brand Names

Also known as (by country):
CountryBrand Names
United Kingdom
Macrobid Macrodantin

FAQ

Nitrofurantoin is a Prescription Only Medicine in the United Kingdom, so a prescription is required when buying it from a local pharmacy. Our store policy allows you to order Nitrofurantoin without a prescription and have it sent by mail.

Do not stop Nitrofurantoin early simply because urinary symptoms improve. Take it for the prescribed course unless the prescriber tells you to stop or you develop a serious reaction; stopping early can leave the infection insufficiently treated.

Not necessarily. Capsule colour, size, markings, packaging and inactive ingredients can differ between products, and the exact brand or manufacturer supplied is not guaranteed. Check the package label for nitrofurantoin, the prescribed strength and capsules before taking it.

Nitrofurantoin is a nitrofuran antibiotic used mainly to treat uncomplicated lower urinary tract infections, such as bladder infections caused by susceptible bacteria. It is not used for thrush or other yeast infections, and it is not suitable for suspected kidney infections because it does not achieve useful tissue levels in the kidneys.

Nitrofurantoin may be used in pregnancy when clinically appropriate, but it is generally avoided late in pregnancy, particularly near term, because of a potential risk of red blood cell breakdown in the newborn. Small amounts pass into breast milk; it is generally avoided if the baby is under 1 month old, has G6PD deficiency, or has jaundice.

Description

Note: Images in the description are provided for informational purposes and may differ from the actual appearance of the product. Please refer to the product name, strength, active ingredients, and pharmaceutical form.

What Furadantin Tablets are and what they are used for

Nitrofurantoin (the active ingredient in Furadantin Tablets) is an antibiotic.

It is used to treat and help prevent lower urinary tract infections (UTIs) of the bladder caused by susceptible bacteria. Nitrofurantoin is not used for kidney infections such as pyelonephritis.

Furadantin

Before you take Furadantin Tablets

Do not take Furadantin Tablets and speak to your doctor if:

  • you are allergic to nitrofurantoin, any of the ingredients in Furadantin Tablets, or any other medicines containing nitrofurantoin. Signs of an allergic reaction can include itching, reddening of the skin, or difficulty breathing;
  • you have anuria, oliguria, or a significant reduction in kidney function (ask your doctor if you are not sure);
  • you have previously had cholestatic jaundice or liver problems linked to nitrofurantoin;
  • you are at term (38 to 42 weeks gestation), in labour or giving birth, or if labour is about to start, because there is a risk it might affect the baby. Tell your doctor if you are not sure about any of the above.

Take special care with Furadantin Tablets and speak to your doctor or pharmacist before taking the tablets if:

  • you have diabetes;
  • you have any illness that causes severe weakness;
  • you have anaemia (a low number of red blood cells, which can cause pale skin, weakness and shortness of breath), a lack of vitamin B, or abnormal salt levels in your blood (your doctor will be able to advise you);
  • you have a history of allergic reactions.

The conditions above may increase the chance of a side effect that affects the nerves, causing altered sensation and pins and needles.

  • you have a lack of an enzyme (a body chemical) called glucose-6-phosphate dehydrogenase, which makes your red blood cells more likely to be damaged (your doctor will know);
  • you have any disease affecting the lungs, liver or nervous system. If you need to take Furadantin Tablets for several months, your doctor may want to check regularly how well your lungs and liver are working.

Taking other medicines

Please tell your doctor or pharmacist if you are taking, or have recently taken, any other medicines, including medicines obtained without a prescription.

  1. Antacids for indigestion that contain magnesium trisilicate;
  2. Medicines for gout (for example, probenecid or sulfinpyrazone).

If you are unsure about any medicines, ask your doctor or pharmacist.

Furadantin Tablets may affect the results of some urine glucose tests (for example, Benedict's or Fehling's copper reduction tests).

Taking Furadantin Tablets with food and drink

Furadantin Tablets should be taken with food or milk, preferably at mealtimes. This can help prevent stomach upset and may improve absorption.

Pregnancy and breast-feeding

Ask your doctor or pharmacist for advice before taking any medicine. Furadantin Tablets are not recommended at term (38 to 42 weeks gestation), during labour and delivery, or when labour is about to start. If you want to breastfeed, speak to your doctor first; breast-feeding is not recommended for infants under 1 month old or for babies with glucose-6-phosphate dehydrogenase (G6PD) deficiency.

Driving and using machines

Furadantin Tablets may cause dizziness and drowsiness. Do not drive or use machines if you are affected, until these symptoms have gone away.

Important information about some of the ingredients in Furadantin® Tablets

This medicine contains lactose and sucrose (sugars). If you have been told by your doctor that you are intolerant to some sugars, contact your doctor before taking this medicine.

How to take Furadantin Tablets

Follow your doctor's instructions exactly and complete the course of treatment, even if you feel better. Check with your doctor or pharmacist if you are not sure. Try not to miss any doses. Tablets should be swallowed whole. Do not crush or chew them.

Adults

The usual dose depends on the type of infection you have, and the instructions should be written on the dispensing label provided by your pharmacist. Ask your pharmacist or doctor if anything is unclear. The usual doses are:

  • For treatment of infections: 50 mg or 100 mg four times a day for 7 days (as prescribed).
  • To help prevent further infections: 50 mg or 100 mg at bedtime (as prescribed).

Children 1 month of age and older

The dose depends on the child's weight and will be decided by your doctor. Follow your doctor's instructions exactly.

Children younger than 1 month old should not take Furadantin Tablets.

Medical checks

Your doctor will monitor you carefully for any effects on the liver, lungs, blood or nervous system.

Furadantin Tablets may affect the results of some urine glucose tests.

If you take more Furadantin Tablets than you should

Contact your doctor or pharmacist immediately, or go to the nearest A&E department. Always take any remaining tablets with you, as well as the container and label, so that the medical staff know what you have taken.

If you forget to take Furadantin Tablets

Do not worry. If you remember later the same day, take that day's dose as usual. If you miss a whole day's dose, take your normal dose the next day. Do not take a double dose to make up for a forgotten tablet. If you are not sure, ask your doctor or pharmacist.

If you stop taking Furadantin Tablets

Your doctor will tell you how long to take this medicine for. Do not stop early, even if you feel better.

If you have any further questions about using this product, ask your doctor or pharmacist.

Possible side effects

Like all medicines, Furadantin Tablets can cause side effects, although not everybody gets them. Most are mild and go away when you stop taking Furadantin Tablets.

All medicines can cause allergic reactions, although serious allergic reactions are rare. If you notice any sudden wheezing, difficulty breathing, swelling of the eyelids, face or lips, rash, or itching (especially affecting your whole body), stop taking your medicine and see a doctor immediately. If you get any of the side effects listed below, stop taking Furadantin Tablets and speak to your doctor.

Your lungs may react to Furadantin Tablets. This can happen quickly, within a week of starting treatment, or very slowly, especially in older patients. This may cause fever, chills, cough and shortness of breath.

Jaundice

Inflammation of the liver may cause yellowing of the skin or the whites of the eyes.

The nerves outside the spinal cord may be affected, causing changes in sensation and muscle use. In addition, headache, marked changes in mood or mental state, confusion, weakness and blurred vision may occur. These effects may be severe and, in some cases, irreversible.

Raised pressure in the skull

This may cause severe headaches.

Please note that while taking Furadantin Tablets, your urine may become dark yellow or brown. This is normal and not a reason to stop taking the medicine. Other side effects include:

  • Feeling sick (nausea) and headache.
  • Diarrhoea.
  • Loss of appetite, stomach ache, and being sick (vomiting).
  • Dizziness and drowsiness.
  • Blood cells have been affected in some patients. This may cause bruising, delayed blood clotting, sore throat, fever, anaemia, and a tendency to catch colds or have a persistent cold.
  • A variety of skin rashes or reactions have occurred in some patients. These may include flaking skin, a red rash, or fever with a fast heart rate and a severe blistering rash. Other reactions may include inflammation of the salivary glands (causing facial pain), inflammation of the pancreas (causing severe abdominal pain), and joint pain.
  • Short-term hair loss.
  • Urinary infection caused by germs that are not sensitive to Furadantin Tablets.

If any side effects become serious, or if you notice any side effects not listed in this leaflet, tell your doctor or pharmacist.

Remember

This medicine is for you only. Only a doctor can prescribe it for you. Never give it to anyone else. It could harm them, even if their symptoms seem the same as yours.

How to store Furadantin Tablets

Keep out of the sight and reach of children.

Store at 20°C to 25°C (68°F to 77°F). Keep in the original tightly closed, light-resistant container to protect from light and moisture.

Do not use Furadantin Tablets after the expiry date stated on the carton (EXP). The expiry date refers to the last day of that month.

Do not dispose of medicines via wastewater or household waste. Ask your pharmacist how to dispose of medicines you no longer need. These measures will help protect the environment.

Medically reviewed by
Brian Holtry
MD, infectious diseases specialist and medical writer
Updated 11 August 2026

Customer questions

Asked by Hannah, Reading, United Kingdom

I'm in Reading and my order has just been marked as dispatched. Does that mean my Nitrofurantoin will arrive tomorrow?

Answered by Support team

No. Dispatched means the parcel has left us; delivery is a separate step. Express delivery is normally 4-7 days and includes tracking, while Standard delivery is normally 14-21 days and usually has no tracking updates.

Asked by Jessica F, Newry, United Kingdom

I live in Newry, Northern Ireland. Can I confirm whether Nitrofurantoin can be delivered to my address before I pay?

Answered by Support team

Yes. Enter your Newry delivery address during checkout to see the destination options available for your order. Availability is confirmed there, rather than assumed for every UK region.

Asked by James, Nottingham, United Kingdom

I've previously taken Macrobid in the United Kingdom. Can I replace it with these Nitrofurantoin capsules?

Answered by Support team

Check that the active ingredient, strength and capsule formulation on your prescription or previous label match before considering a replacement. The manufacturer, capsule appearance, packaging and inactive ingredients may differ, so a brand name alone does not establish that the products are interchangeable.

Asked by Lauren, Newcastle upon Tyne, United Kingdom

Before ordering from Newcastle upon Tyne, can I check whether delivery is available to my postcode?

Answered by Support team

Yes. Add your Newcastle upon Tyne postcode and address at checkout to check the delivery options for that destination before completing your order.

Asked by Priya, Manchester, United Kingdom

I have diabetes and sometimes check glucose in my urine. Will Nitrofurantoin affect the result?

Answered by Support team
Medical reviewed by Donna Brettler

Nitrofurantoin can cause false-positive urine glucose results with older copper-reduction tests, such as Benedict's or Fehling's tests. It can also rarely cause peripheral neuropathy, and diabetes is a risk factor, so report new tingling, numbness or burning pain promptly.

Product specifications

Active ingredientNitrofurantoin
Drug classNitrofuran antibiotic
Dosage formCapsules
Available strengths50 mg, 100 mg
Route of administrationOral
StorageStore at 20°C to 25°C; excursions permitted between 15°C and 30°C. Keep in a tightly closed, light-resistant container and protect from moisture.
ATC codeJ01XE01

Regulatory information

Marketing authorisationNitrofurantoin is fully authorised for human medical use within the United Kingdom.
Legal classificationCapsules containing this active ingredient are classified as a prescription-only medicine (POM) and require a valid prescription.

More information