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(isosorbide mononitrate)
This product is available using any of the above names but will be referred to as Imdur
throughout the following leaflet.
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 pharmacist.

This medicine has been prescribed for you only. Do not pass it on to others. It may
harm them, even if their signs of illness are the same as yours.

If you get any 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 Imdur is and what it is used for
2. What you need to know before you take Imdur
3. How to take Imdur
4. Possible side effects
5. How to store Imdur
6. Contents of the pack and other information
Imdur contains a medicine called isosorbide mononitrate. This belongs to a group of
medicines called 'nitrates'.
• It is used to prevent chest pain (angina).
• It works by making the blood vessels relax and widen. This makes it easier for the
heart to pump blood around the body.
The tablets are made so that they release the medicine slowly over a number of hours.
Do not take Imdur:
• If you are allergic to isosorbide mononitrate or any of the other ingredients of this
medicine (listed in section 6).
• If you have ever had a stroke.
• If you have very low blood pressure.
• If you have severe anaemia.
• If you have a heart problem called 'cardiomyopathy' or 'pericarditis' or you have
narrow heart valves.
• If you are taking sildenafil or similar medicines called Phosphodiesterase Type 5
Inhibitors, (used for male impotence). See the section “Other medicines and Imdur”.
Do not take Imdur if any of the above apply to you. If you are not sure, talk to your
doctor or pharmacist before taking Imdur.
Warnings and precautions
Talk to your doctor or pharmacist before taking Imdur if:
• You have ever had any serious damage to your heart, such as a heart attack or
If any of the above apply to you, or you are not sure, talk to your doctor or pharmacist
before taking Imdur.
Other medicines and Imdur
Tell your doctor or pharmacist if you are taking, have recently taken or might take any
other medicines. This includes medicines that you buy without a prescription and herbal
medicines. This is because Imdur can affect the way some medicines work and some
medicines can have an effect on Imdur.
Do not take Imdur if you are taking the following medicines:
• Sildenafil or similar medicines called Phosphodiesterase Type 5 Inhibitors, (used for
male impotence).
Do not take Imdur if any of the above apply to you. If you are not sure, talk to your
doctor or pharmacist before taking Imdur.
Pregnancy, breast-feeding and fertility
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 advice before taking this medicine.
Driving and using machines
You may feel dizzy after taking Imdur. If this happens, do not drive or use any tools or
Always take this medicine exactly as your doctor or pharmacist has told you. Check
with your doctor or pharmacist if you are not sure.
Taking this medicine
• Swallow the tablets whole or broken in half (if this is easier to swallow).
• Take the tablets with half a glass of water.
• Do not crush or chew the tablets.
How much to take
• The recommended dose is one or two tablets a day.
• Take the medicine in the morning.
• Your doctor may ask you to start on a low dose so that you are less likely to have a
reaction to starting Imdur.
• The blister strips are marked with the days of the week. If you are taking two tablets a
day, make sure you take one tablet from each strip marked with the same day of the
You must not take Imdur for a sudden attack of angina. If you have a sudden
attack, take a glyceryl trinitrate tablet (follow the instructions given on the label).
Very occasionally, some people see the remains of the tablet in their bowel motions.
This is quite normal and does not mean that the medicine has not been released.

Use in children
Do not give these tablets to children.
If you take more Imdur than you should
If you take more Imdur than you should, talk to a doctor or go to a hospital straight
away. Take the medicine pack with you so the tablets can be identified.
If you forget to take Imdur
• If you forget a dose, take it as soon as you remember it. However, if it is nearly time
for the next dose, skip the missed dose.
• Do not take a double dose to make up for a forgotten dose.
If you have any further questions on the use of this medicine, ask your doctor or
Like all medicines, this medicine can cause side effects, although not everybody gets
them. The following side effects may happen with this medicine:
• Headaches.
• Feeling sick (nausea).
• Feeling dizzy.
The above problems usually disappear with time.
Other possible side effects:
Common (may affect up to 1 in 10 people)
• Low blood pressure. This may make you feel faint or dizzy.
• Faster heartbeat
• Headache
• Feeling dizzy
• Feeling sick (nausea).
Uncommon (may affect up to 1 in 100 people)
• Being sick (vomiting)
• Diarrhoea
Rare (may affect up to 1 in 1,000 people)
• Fainting
• Rash
• Itchy skin
Very rare (may affect up to 1 in 10,000 people)
• Pain in muscles
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
• Keep out of the sight and reach of children.
• Do not use after the expiry date printed on the blister or carton label. The expiry date
refers to the last day of that month.
• Do not store above 30°C.
• If the tablets become discoloured or show any other signs of deterioration, you
should ask your doctor or pharmacist who will advise you what to do.
• Medicines should not be disposed of via wastewater or household waste. Ask your
pharmacist how to dispose of medicines no longer required. This will help to protect
the environment.
Each tablet contains 60mg of the active ingredient, Isosorbide Mononitrate in a
sustained release tablet. The tablets are pale yellow, oval, film coated, and coded A/ID
with breaklines on each side.
Imdur also contain the following:
aluminium silicate, paraffin, magnesium stearate, hydroxypropylcellulose, colloidal
silicon dioxide, hydroxypropylmethylcellulose, polyethylene glycol 6000, titanium
dioxide (E171) and yellow iron oxide (E172) and hydrogen peroxide (30%).
Imdur is available as calendar blister packs of 28 tablets.
PL No: 15814/0085

Imdur® 60mg Durules® / Imdur® 60mg Tablets


This product is manufactured by AstraZeneca AB, Sodertalje, Sweden and is procured
from within the EU and repackaged by the Product Licence holder: OPD Laboratories
Ltd, Unit 6 Colonial Way, Watford, Herts WD24 4PR.
Leaflet revision and issue date (ref): 03.07.2015.
Imdur and Durules are registered Trade Marks of AstraZeneca AB, Sweden.
To request a copy of this leaflet in Braille, large print or audio please call 01923 332

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.