UK Edition. Click here for US version.
URANTOIN/NITROFURANTOIN 100MG TABLETS
Active substance(s): NITROFURANTOIN
like pins and needles.
Patient Leaflet: Information for the user
Urantoin 50 & 100 mg Tablets
Read all of this leaflet carefully before you start taking this
medicine because it contains important information for you.
•Keep this leaflet. You may need to read it again.
•If you have any further questions, ask your doctor or
•This medicine has been prescribed for you only. Do not pass it
on to others. It may harm them, even if their symptoms are the
same as yours.
•If you get any of the side effects, talk to your doctor or
pharmacist. This includes any possible side effects not listed in
this leaflet. See section 4.
What is in this leaflet:
1. What Urantoin is and what it is used for
2. What you need to know before you take your medicine
3. How to take your medicine Urantoin
4. Possible side effects
5. How to store your medicine Urantoin
6. Content of the pack and other information
1. What Urantoin is and what it is used for
The name of this medicine is Urantoin which contains the active
substance, nitrofurantoin BP and is available in strengths of 50
mg and 100 mg per tablet.
Urantoin is an antibiotic. It is used to prevent and treat infections of
the bladder, kidney and other parts of the urinary tract.
2.What you need to know before you take your medicine
Do not take these tablets and talk to your doctor if:
you are allergic (causing itching, reddening of the skin or
difficulty in breathing) to Urantoin or any of the other
ingredients of this medicine (listed in section 6)
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 have G6PD (glucose-6-phosphate dehydrogenase)
in infants under three months of age
you are breast feeding a baby with suspected or known
deficiency in an enzyme called G6PD (glucose- 6-phosphate
Tell your doctor if you are not sure about any of the above.
Warnings and Precaution:
Talk to your doctor or pharmacist before taking Urantoin if you:
have false positive results on testing your urine for glucose
your urine is dark yellow or brown coloured.
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)
Other medicines and Urantoin:
Tell your doctor or pharmacist if you are taking, or have recently
taken or might take any other medicines, including medicines
obtained without prescription.
You can take these tablets with other medicines, but there
are some medicines that can interfere with Urantoin tablets:
- Antacids for indigestion (e.g. magnessium trisilicate)
- Medicines for gout (e.g. probenecid or sulfinpyrazone)
- Medicines for raised pressure in the eye (glaucoma), such as
carbonic anhydrase inhibitors (e.g. acetazolamide)
- There is an increased absorption of Urantoin with food
- Medicines which slow the passage of food through the stomach
(e.g. atropine, hyoscine)
- Medicines which make the urine less acidic (e.g. potassium
- Medicines for infections, known as quinolones
- Oral contraceptives “the pill”. You will need to use extra
contraceptive precautions such as using a condom, as
antibiotics can make the contraceptive pill less effective
-Typhoid vaccine, which is given for the prevention of typhoid.
Urantoin with food and drink
Urantoin Tablets should be taken at meal times with food or
milk. This will help to avoid stomach upset and also to help the
Pregnancy and Breast-feeding
If you are pregnant or breast-feeding, think you may be pregnant
or are planning to have a baby, ask your doctor or pharmacist for
advise before taking this medicine.
As far as it is known Urantoin Tablets 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 breast feed, please consult your doctor first.
Driving and using machines:
Urantoin Tablets may cause dizziness and drowsiness. You should
not drive or operate machinery if you are affected this way until
such symptoms go away.
Important information about some of the ingredients in
This medicine contains lactose. If you have been told by your
doctor that you are intolerant to some sugars and have to avoid
them, contact your doctor before taking this medicine.
have any disease of the lungs, liver or nervous system. If
you need to take Urantoin Tablets for a number of months,
your doctor may want to regularly check how your lungs and
liver are working
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)
3. How to take your medicine Urantoin
are suffering from any illness causing severe weakness
Urantoin tablets are taken by mouth and only in the doses
prescribed by your doctor. Do not take more of it and do not take it
more often or for a longer time than your doctor ordered.
are on long-term therapy (especially elderly receiving the
have a history of allergic reactions. The above conditions
may increase the chance of developing a side effect which
Always take this medicine exactly as your doctor or pharmacist
has told you. Check with your doctor 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. Below are examples of usual doses given.
Adults and Elderly:
Uncomplicated acute urinary tract infections:
50 mg (one 50 mg tablet) four times a day for seven
Severe chronic recurrence:
100 mg (one 100 mg tablet/ two 50 mg tablets) four
times a day for seven days.
100 mg (one 100 mg tablet/ two 50 mg tablets) once a
50 mg (one 50 mg tablet) four times a day for duration
of any surgical procedure and continue for 3 days
Use in Children:
Children (above 3 months of age):
Dose depends on the weight of the child and will be provided by
your doctor. Follow your doctor’s instructions exactly.
Children below 3 months of age should not take Urantoin
Your doctor will watch carefully for any effects on the liver,
lungs, blood or nervous system. Urantoin Tablets may interfere
with the results of some tests for glucose in the urine.
If you take more Urantoin you should:
If you accidentally take more tablets than recommended contact
your nearest doctor or hospital casualty department at once. Take
any remaining tablets with you and keep in the original container
or packaging so that they can be identified.
slowly, especially in elderly patients. This may produce fever,
chills, cough and shortness of breath
Hepatic: active hepatitis, jaundice (inflammation of the liver
causing yellowing of the skin or whites of the eyes)
Neurological: nystagmus, 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, blurred vision may occur.
These effects may be severe and in some instances permanent
Raised pressure in the skull (causing severe headaches).
Please note that while taking Urantoin Tablets 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:
• Feeling sick (nausea) and headache
• Loose stools
• Loss of appetite, stomach ache, 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 gland (causing
severe abdominal pain) and joint pains
• Short-term hair loss
• Urinary infection by germs which are not sensitive to
If any of the side effects become serious, or if you notice any
side effects not listed in this leaflet, please tell your doctor or
Reporting of side effects
If you forget to take Urantoin
If you get any side effects, talk to your doctor or pharmacist.
If you miss a dose, skip the missed dose and go back to your
regular dosage schedule. Do not take two doses at once.
This includes any possible side effects not listed in this leaflet. You
can also report side effects directly via Yellow card Scheme:
www.mhra.gov.uk/yellowcard.By reporting side effects you can
help provide more information on the safety of this medicine.
If you stop taking Urantoin
You should not stop taking Urantoin Tablets suddenly. Your
doctor will tell you how long to take the treatment. Do not stop
earlier than you are told, even if you feel better.
5. How to store Urantoin
Keep this medicine out of the sight and reach of children.
If you feel that this medicine is not working as well after you
have taken it for a short time (1 week) do not increase the dose,
instead check with your doctor.
Keep your medicine in a dry place, below 25ºC in a well-closed
container. Protect from light.
If you have any further questions on the use of this medicine,
ask your doctor.
If your doctor tells you to stop the treatment, return any
remaining tablets to the pharmacist. Only keep the medicine if
the doctor tells you to.
4. Possible 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 Urantoin Tablets.
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 Urantoin Tablets and consult your doctor.
• Respiratory: chest pain, changes in ECG, collapse and
cyanosis. Your lungs may react to Urantoin Tablets. This may
develop quickly, within a week of starting treatment or very
On the label you will find the words "Expiry Date" followed by
numbers indicating the day, month and year. This is the date
when the medicine is no longer fit for use. Do not throw away
any dispose of your medicines via waste water or household
waste. Ask your pharmacist how to throw away dispose of
medicines which you no longer require. These measures will
help protect the environment.
6. Content of the Pack and other information
Urantoin tablets is available in strengths of 50 mg and 100 mg
per tablet as follows:
Urantoin 50 mg tablets contain 50 mg nitrofurantoin BP. Urantoin
100 mg tablets contain 100 mg nitrofurantoin BP.
Both strengths are flat, yellow bevelled and scored tablets and
contain lactose, maize starch, pregelatinised maize starch,
sodium starch glycollate, magnesium stearate.
Both strengths of Urantoin tablets are available in containers and
blister packs of 28, 30, 50, 56, 60, 84, 100, 250, 500 and 1,000
Marketing Authorisation Holder
Chelonia Healthcare Limited, Boumpoulinas 11, 3rd Floor,
Nicosia, P.C.1060, Cyprus
Meridian Healthcare (UK) Ltd, 208-214 York Road, London
This leaflet was last revised in September 2016