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Macrodantin® 100 mg Capsules


Read all of this leaflet carefully before you start taking this medicine.
Keep this leaflet. You may need to read it again. If you have any further
questions, ask your doctor or pharmacist. This medicine has been
prescribed for you. Do not pass it on to others. It may harm them, even if
their symptoms are the same as yours. If any of the side effects becomes
serious, or if you notice any side effects not listed in this leaflet, please tell
your doctor or pharmacist.
Your medicine will be referred to as Macrodantin Capsules throughout this
leaflet. It is also available in other strength.
In this leaflet:
1. What Macrodantin Capsules are and what they are used for
2. Before you take Macrodantin Capsules
3. How to take Macrodantin Capsules
4. Possible side effects
5. How to store Macrodantin Capsules
6. Further information
Nitrofurantoin (the active substance in Macrodantin Capsules) is an antibiotic.
It is used to prevent and treat infections of the bladder, kidney and other
parts of the urinary tract.
DO NOT TAKE Macrodantin Capsules and talk to your doctor if:
- you are allergic (causing itching, reddening of the skin or difficulty in
breathing) to nitrofurantoin or any of the ingredients of Macrodantin
Capsules (listed in Section 6 at the end of the leaflet) or other medicines
containing nitrofurantoin
- 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 suffer from a blood disorder called porphyria
- you are deficient in an enzyme called G6PD (glucose-6-phosphate
- 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 dehydrogenase).
Tell your doctor if you are not sure about any of the above.
TAKE SPECIAL CARE with Macrodantin Capsules and speak to your
doctor or pharmacist before taking the 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.
The above conditions may increase the chance of developing a side effect
which results in damage to the nerves, causes altered sense of feeling,
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 Macrodantin Capsules for a number of months, your doctor may
want to regularly check how 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. If they are taken with Macrodantin Capsules their effect or the
effect of Macrodantin Capsules may be changed.
- 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
- Medicines for infections, known as quinolones
- Oral contraceptive “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.

If you are in doubt about any of these medicines ask your doctor or
Macrodantin Capsules may interfere with the results of some tests for
glucose in the urine.
Taking Macrodantin Capsules with food and drink:
Macrodantin Capsules should be taken at meal times with food or milk. This
will help to avoid stomach upset and also to help the absorption.
Pregnancy and breast-feeding:
Ask your doctor or pharmacist for advice before taking any medicine. As far
as it is known Macrodantin 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 breast
feed, please consult your doctor first.
Driving and using machines:
Macrodantin Capsules 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 Macrodantin
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.
Follow your doctor’s instructions exactly and complete the course of
treatment even if you feel better. You should check with your doctor or
pharmacist if you are not sure.
Do not forget to take your medicine.
Capsules should be swallowed whole.
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. The
usual doses are:
- For treatment of infections: Either one 50mg capsule or one 100mg
capsule four times a day for seven days
- For prevention of further infections: Either one 50mg capsule or one
100mg capsule at bedtime
- For prevention of infections during surgery: One 50mg capsule four times
a day on the day of the operation and three days thereafter.
Children and infants over three months of age:
The 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 Macrodantin
Macrodantin Capsules should be taken with food or milk.
Medical Checks:
Your doctor will watch carefully for any effects on the liver, lungs, blood or
nervous system.
Macrodantin Capsules may interfere with the results of some tests for
glucose in the urine.
If you TAKE MORE Macrodantin Capsules than you should:
Consult your doctor or pharmacist immediately or go to the emergency
department of the nearest hospital. Always take any left over capsules with
you, as well as the container and label, so that the medical staff knows
what you have taken.
If you FORGET TO TAKE Macrodantin Capsules:
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 capsule. If you
are not sure ask your doctor or pharmacist.
If you STOP TAKING Macrodantin 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 product, ask your doctor
or pharmacist.

Like all medicines, Macrodantin Capsules can cause side effects, although
not everybody gets them. Most of them are mild and disappear when you
stop taking Macrodantin 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 immediately.
If you experience any of the side effects detailed below stop taking
Macrodantin Capsules and consult your doctor.
- Your lungs may react to Macrodantin 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
- 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, blurred
vision may occur. These effects may be severe and in some instances
- Raised pressure in the skull (causing severe headaches).
Please note that while taking Macrodantin 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:
- 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 (causing severe abdominal pain) and joint
- Short-term hair loss
- Urinary infection by germs which are not sensitive to Macrodantin
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 pharmacist.
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:
By reporting side effects, you can help provide more information on the
safety of this medicine.
This medicine is only for you. Only a doctor can prescribe it for you.
Never give this medicine to someone else. It could harm them, even if
their symptoms seem the same as yours.
Keep this medicine out of the sight and reach of children.
Do not store above 25°C.
Store in the original package to protect from light and moisture.
Do not use Macrodantin Capsules after the expiry date which is stated on
the carton. The expiry date refers to the last day of that month.
If your capsules become discoloured or show any other signs of
deterioration please ask your doctor or pharmacist before taking your
Medicines should not be disposed of via wastewater or household waste.
Ask your pharmacist how to dispose of medicines no longer required.
These measures will help to protect the environment.
What Macrodantin Capsules contains:
The active substance is nitrofurantoin.
Each capsule contains 100 mg nitrofurantoin (in macrocrystalline form).
Other ingredients are talc, maize starch, lactose.
The capsule shell contains gelatin, sodium lauryl sulphate, quinoline yellow
(E104) and titanium dioxide (E171).

What Macrodantin Capsules looks like and contents of the pack:
Appearance: Hard gelatin capsule with an opaque yellow cap and opaque
yellow body. The capsules are printed in edible black ink and bears the
monogram “Eaton 009” on both the cap and body.
Packaging: The capsules are available in blister packs of 30 and 50.
Manufactured by Lusomedicamenta S.A., Sociedade Técnica
Farmacêutica, Estrada Consiglieri Pedroso, 69-B Queluz de Baixo, 2730055 Barcarena, Portugal.
Procured from within the EU by Product Licence holder
Star Pharmaceuticals Ltd., 5 Sandridge Close, Harrow, Middesex, HA1 1XD.
Repackaged by Servipharm Ltd.


PL 20636/2848

Leaflet revision and issue date (Ref) 01.04.16[2]
Macrodantin is a trademark of Mercury Pharma Group Limited.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.