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Imdur 60 mg tablets – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
60 mg
Contains active substance:

Patient leaflet - Imdur 60 mg tablets

1. What Imdur is and what it is used for

lmdur contains a medicine called isosorbide mononitrate. This belongs to a group of medicines called 'nitrates'.

  • lt 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.

2. What you need to know before you take Imdur

Do not take lmdur:

  • If you are allergic to isosorbide mononitrate or any of the other ingredients of this medicine (listed in section 6).
  • lf 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 sildenafiI or similar medicines called Phosphodiesterase Type 5 Inhibitors, (used for male impotence).

    See the section "Other medicines and lmdur".

Do not take lmdur if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking lmdur. Warnings and precautions

Talk to your doctor or pharmacist before taking lmdur if:

  • You have ever had any serious damage to your heart, such as a heart attack or operation.

If any of the above apply to you, or you are not sure, talk to your doctor or pharmacist before taking lmdur. Other medicines and lmdur

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 lmdur can affect the way some medicines work and some medicines can have an effect on lmdur.

Do not take lmdur if you are taking the following medicines:

  • Sildenafil or similar medicines called Phosphodiesterase Type 5 Inhibitors, (used for male impotence). Do not take lmdur if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking lmdur. 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 lmdur. If this happens, do not drive or use any tools or machines.

3. How to take Imdur

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 lmdur.
  • 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 week.

You must not take lmdur for a sudden attack of angina. If you have a sudden attack, take a glyceryt trinilrate 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 lmdur 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 lmdur

  • 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 pharmacist.

4. Possible side effects

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.
  • ltchy 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 or pharmacist. 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 Store. By reporting side effects you can help provide more infomation on the safety of this medicine.

5. How to store Imdur

  • Keep this medicine out of the sight and reach of children.
  • Do not store above 30°C.
  • Do not use this medicine after the expiry date which is stated on the carton. The expiry date refers to the last day of that month.
  • Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
  • If your tablets show signs of deterioration or discolouration seek the advice of your pharmacist who will tell you what to do.

6. Contents of the pack and other information

What lmdur contains

  • The active substance is isosorbide mononitrate. Each tablet contains 60 mg isosorbide mononitratein an extended-release formulation.
  • Also contains sodium aluminium silicate, paraffin (special), hydroxypropyl cellulose LF, magnesium stearate (vegetable origin), colloidal silicon dioxide, hypromellose 6 CPS, macrogol 6000, titanium dioxide (E171) Cl 77891, and yellow iron oxide (E172) Cl 77492. What lmdur looks like and contents of the pack

Yellow, oval, biconvex, film-coated tablet, scored on both sides, engraved A/ID on one side.

Available in calendar blister packs of 28 modified-release tablets.

Manufactured by Laboratorios Alcala Farma S.L. Avenida de Madrid, 82 Alcala de Henares, Madrid, 28802, Spain. Procured from within the EU and repackaged by Product Licence Holder Uni Health Distribution Ltd, Unit G4 Riverside Industrial Estate, Riverside Way, Dartford, Kent, DA1 5BS.

PL 45396/0081 P

Leaflet date: 12 October 2020 Ref: Imd60/v1A

Imdur is a registered trademark of the AstraZeneca group of companies.

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About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 45396/0081

Last revision stated in the text: 12 October 2020 · MHRA data as of 13 October 2026

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The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Imdur 60 mg tablets

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Isosorbide mononitrate
Strength 60 mg
Pharmaceutical form Modified-release tablet
How is it taken Oral
Pack sizes 28 tablet
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Drug group (ATC)
  1. C Cardiovascular system drugs
    1. C01 Cardiac therapy drugs
      1. C01D Vasodilators used in cardiac diseases
        1. C01DA Organic nitrates used in cardiac disease
          1. C01DA14 isosorbide mononitrate
Marketing authorisation PL 45396/0081, PLPI 15184/0074
Codes GTIN 4897078270161 · BNF 02060100

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.2.0 of 19 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.