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Nitrofurantoin 50mg Capsules x 12

From £15.69

Product features

Used as a treatment in bacterial infections of the urinary tract. ONE capsule FOUR times a day for 3 days


Nitrofurantoin (the active ingredient) is an antibiotic. It is used to prevent and treat infections of the bladder, kidney and other parts of the urinary tract. Nitrofurantoin works by killing bacteria. It does this by slowing folate synthesis which is required by the bacteria for replication.

Side Effects

Like all medicines, this medicine can cause side effects, although not everybody gets them. Most of
them are mild and disappear when you stop taking Nitrofurantoin Capsules.
All medicines can cause allergic reactions although serious allergic reactions are rare. If you
notice any sudden wheeziness, difficulty in breathing, swelling of the eyelids, face or lips, rash or
itching (especially affecting your whole body) STOP TAKING your medicine and go to a doctor
If you experience any of the side effects detailed below stop taking Nitrofurantoin Capsules and
consult your doctor.
• Your lungs may react to Nitrofurantoin Capsules. This may develop quickly, within a week of
starting treatment or very slowly, especially in elderly patients. This may produce fever, chills, cough
and shortness of breath associated with pneumonia. Scaring due to damaged lung tissue may occur
• Jaundice (inflammation of the liver causing yellowing of the skin or whites of the eyes)
• The nerves outside the spinal cord may be affected causing changes to the sense of feeling and the
use of muscles. In addition, headache, extreme changes of mood or mental state, confusion, weakness,
involuntary eye movement (which may cause the eye to rapidly move from side to side, up and down
or in a circle, and lightly blur vision) may occur. These effects may be severe and, in some instances,
• Raised pressure in the skull (causing severe headaches)
• Severe reduction in blood cells which can cause weakness, bruising or make infections more likely
• Blue or purple coloration of the skin due to low oxygen levels. A condition known as cyanosis
• Symptoms of fever, flu, abdominal pain, diarrhea, blood in your stool and weakness. These could be
signs of a condition known as cutaneous vasculitis
• Symptoms of jaundice, fatigue, abdominal pain, joint pain and swelling. These could be signs of a
condition known as autoimmune hepatitis.
Please note that while taking Nitrofurantoin Capsules your urine may become dark yellow or brown
coloured. This is quite normal and not a reason to stop taking the medicine.
Other side effects include:
Rare: may affect up to 1 in 1,000 people
• Loss of consciousness (collapse)
• Damage to bone marrow causing deficiency of the red blood cells (Anaemia)
Not known: frequency cannot be estimated from the available data
• Feeling sick (nausea) and headache
• Loose stools
• Loss of appetite, stomachache, and being sick (vomiting)
• Dizziness, drowsiness
• Blood cells have been affected in some patients. This may result in bruising, delayed clotting of the
blood, sore throat, fever, anaemia, and a susceptibility to colds or persistent cold
• A variety of skin rashes or reactions have occurred in some patients. These may appear as flaking
skin, a red rash or fever accompanied by rapid heart rate and severe rash with blistering. Other
reactions may include inflammation of salivary glands (causing facial pains), inflammation of the
pancreas (causing severe abdominal pain) and joint pains
• Short-term hair loss
• Urinary infection by germs which are not sensitive to Nitrofurantoin Capsules.
• Inflammation of small blood vessel walls, causing skin lesions
• Liver inflammation due to turn of immune system against liver cells
• Inflammation of kidney tissue surrounding tubules, causing renal impairment
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side
effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme
at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App
By reporting side-effects, you can help provide more information on the safety of this medicine

Info Leaflet

Before taking any medication, it is important to read the Patient Information Leaflet. You can find information leaflets for your medicines by typing them into the search bar at medicines.org, or by contacting us.

Patient Information Leaflet Nitrofurantoin 50mg Capsules

Other medicines and Nitrofurantoin Capsules

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

If they are taken with Nitrofurantoin Capsules, their effect or the effect of Nitrofurantoin Capsules may be changed. In particular, tell your doctor or pharmacist if you are taking any of the following medicines:

Antacids for indigestion (e.g. magnesium trisilicate)
Medicines for gout (e.g. probenecid or sulfinpyrazone)
Medicines which slow the passage of food through the stomach (e.g. atropine, hyoscine)
Medicines for raised pressure in the eye (glaucoma) such as carbonic anhydrase inhibitors (e.g. acetazolamide)
Medicines which make the urine less acidic (e.g. potassium citrate mixture)
Medicines for infections, known as quinolones
Typhoid vaccine, which is given for the prevention of typhoid.
If you are in doubt about any of these medicines ask your doctor or pharmacist.

Nitrofurantoin may interfere with the results of some tests for glucose in the urine.

Nitrofurantoin Capsules with food and drink
Nitrofurantoin Capsules should always be taken with food or milk. This will help to avoid stomach upset and also help the absorption to make the medicine work more effectively.

Pregnancy and breastfeeding
If you are pregnant or breastfeeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. As far as is known Nitrofurantoin Capsules may be used in pregnancy. However, it should not be used during labour or delivery because there is a possibility that use at this stage may affect the baby. If you want to breastfeed, please consult your doctor first.

Driving and using machines
Nitrofurantoin Capsules may cause dizziness and drowsiness. You should not drive or operate machinery if you are affected this way until such symptoms go away.

Nitrofurantoin Capsules contain lactose
This medicine contains lactose (sugars). If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

How to store Nitrofurantoin Capsules

Do not store above 25˚C.
Do not open the container until you are ready to begin taking the course of treatment.
Do not use this medicine after the expiry date which is stated on the bottle/label after ‘Exp (MM/YY)’. The expiry date refers to the last day of that month. Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
Keep this medicine out of the sight and reach of children. 


Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

The normal dosage depends on the type of infection you have and instructions should be written on the label provided by the pharmacist. Consult your pharmacist or doctor if these instructions are not clear.


ONE capsule FOUR times a day for 3 days

Use in Children and Infants over three months of age:

Children below 3 months of age should not take Nitrofurantoin Capsules.

The dose depends on the weight of the child and will be provided by your doctor. Follow your doctor’s instructions exactly.
Medical Checks
Your doctor will watch carefully for any effects on the liver, lungs, blood or nervous system. Nitrofurantoin Capsules may interfere with the results of some tests for glucose in the urine. 


Capsules should be swallowed whole. 
Nitrofurantoin capsules should always be taken with food or milk. Taking this medicine with food or milk
makes it work more effectively.

If you take more Nitrofurantoin Capsules than you should
Consult your doctor or pharmacist immediately or go to the emergency department of the nearest hospital. Always take any leftover capsules with you, as well as the container and label, so that the medical staff know what you have taken. You may experience symptoms of stomach ache, nausea and vomiting.

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

If you stop taking Nitrofurantoin Capsules
Your doctor will tell you how long to take the treatment. Do not stop earlier than you are told, even if you feel better. If you have any further questions on the use of this medicine, ask your doctor or pharmacist.


Do not take Nitrofurantoin Capsules if:

  • you are allergic to Nitrofurantoin, other medicines containing nitrofurantoin or any of the other ingredients
  • you have a disease of the kidneys which is severely affecting the way they work (ask your doctor if you are not sure)
  • you are in the final stages of pregnancy (labour or delivery) as there is a risk that it might affect the baby
  • you have porphyria (blood disorder)
  • you are a patient with G6PD (glucose-6-phosphate dehydrogenase) deficiency
  • your child is under three months of age
  • you are breastfeeding a baby with suspected or known deficiency in an enzyme called G6PD (glucose-6-phosphate-dehydrogenase)
  • Tell your doctor if you are not sure about any of the above.

Warnings and precautions:
Talk to your doctor or pharmacist before taking Nitrofurantoin capsules if:

  • you have diabetes
  • you are suffering from any illness causing severe weakness
  • you have anaemia (a decrease in red blood cells causing pale skin, weakness and breathlessness) or a lack of vitamin B or abnormal levels of salts in your blood (your doctor will be able to advise you)
  • you have a history of allergic reactions
  • if you have any problems with your kidneys

The above conditions may increase the chance of developing a side effect which results in damage to the nerves, causing altered senses of feeling like pins and needles.

  • you lack an enzyme (body chemical) called glucose-6-phosphate dehydrogenase which causes your red blood cells to be more easily damaged (This is more common in black people and people of Mediterranean, Middle Eastern or Asian origin. Your doctor will know.)
  • you have any disease of the lungs, liver or nervous system. If you need to take Nitrofurantoin Capsules for a number of months, your doctor may want to regularly check how your lungs and liver are working
  • you have false positive results on testing your urine for glucose
  • your urine is dark yellow or brown coloured.

Talk to your doctor if you experience fatigue, yellowing of the skin or eyes, itching skin rashes, joint pain, abdominal discomfort, nausea, vomiting, loss of appetite, dark urine and pale or grey coloured stools. It may be symptoms of liver disorder.


What Nitrofurantoin Capsules contain

The active substance (which makes the medicine work) is Nitrofurantoin. Each capsule contains 50mg Nitrofurantoin in macrocrystalline form.

The other ingredients are: lactose, maize starch, pregelatinised maize starch, sodium starch glycolate and magnesium stearate.

What Nitrofurantoin Capsule look like and contents of the pack

Nitrofurantoin 50 mg capsule is hard gelatin capsule with yellow cap and white body with dimensions: Length approximately 16 mm and diameter approximately 6 mm. The capsules are available in PVC/aluminium blister packs of 30.

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