Isosorbide Mononitrate Tablets 10mg, 20mg and 40mg
Please read this leaflet carefully before you start to take your medicine.
It tells you some of the more important things you should know.
If you want to know more, or you are not sure about anything, ask your doctor or pharmacist.
What’S In Your Medicine
Isosorbide Mononitrate Tablets are circular white to off-white uncoated tablets which come in three strengths, containing 10mg; 20mg; or 40mg of the active ingredient isosorbide mononitrate.
They also contain: lactose magnesium stearate, maize starch, polyvidone; E460 (10mg and 40mg only)
Isosorbide Mononitrate Tablets are available in pack sizes of 56s.
Isosorbide mononitrate is one of a group of medicines called nitrate vasodilators. These drugs relax the muscle layer in the blood vessel wall of the heart. This reduces strain on the heart by making it easier to pump blood.
MA holder/Manufacturer:
About Your Medicine
The name of your medicine is Isosorbide mononitrate which is the generic (common) name. Your doctor may have given you this medicine before from another company and it may have looked slightly different. Either brand will have the same effect.
Isosorbide Mononitrate Tablets are used to
- relieve the pain and frequency of angina attacks.
- help control certain types of heart failure.
Before Taking Your Medicine
Make sure you have told your doctor if you:
- are pregnant, plan to become pregnant, or are breast feeding.
- are sensitive to any of the ingredients in the product or are sensitive to isosorbide dinitrate.
- have any blood disorders or anaemia.
- have angina that is caused by an enlarged heart muscle.
- have glaucoma (increased pressure in the eye).
- have recently suffered from a head injury or have suffered from bleeding into the brain.
- have any condition where your blood pressure is very low or your blood is not circulating properly, such as shock.
- have liver or kidney problems.
- have an underactive thyroid gland.
- suffer from very low body temperature (hypothermia) or are malnourished.
- are taking other medicines such as ACE inhibitors (eg captopril, enalapril), acetylcholine, beta-blockers, histamine or noradrenaline and any others that you have bought without prescription.
If sildenafil, tadalafil or vardenafil (for male erection dysfunction) is used by patients taking nitrate preparations such as Isosorbide Mononitrate Tablets a severe and possibly dangerous fall in blood pressure can occur. This would result in collapse, unconsciousness and could be fatal. You should not take these whilst on Isosorbide Mononitrate Tablets.
You are advised NOT to drink alcohol with this medicine.
If you see another doctor or go into hospital, let them know what medicines you are taking.
Taking Your Medicine
Your doctor has decided the dose which is best for you. Always follow your doctor’s instructions exactly, and those on the pharmacy label. If you do not understand anything, ask your doctor or pharmacist.
The usual dosage(s) are described below:
Indication: Dosage
Adults (including the elderly)
Angina: Initially 20mg twice daily then 20mg two or three times daily. The usual maintenance dosage range is 20-120mg daily.
Congestive heart failure: Usually 20mg two or three times daily (40-60mg). The dosage will depend upon your clinical condition. Your doctor will also usually be treating you with other drugs.
If you have kidney or liver disease you may be given a smaller dose.
These tablets should be taken as instructed swallowed whole after meals, followed by a glass of water. Continue to take them for as long as your doctor tells you to, it may be dangerous to stop without their advice.
If you forget to take a dose, take another as soon as you remember and then your next dose at the usual time. NEVER take two doses at the same time.
If you are elderly, it is particularly important to take this medicine exactly as directed by the doctor.
If you accidentally take more than your prescribed dose, contact your nearest hospital casualty department, or tell your doctor, immediately. Take any remaining tablets and the container with you to give to the doctor.
After Taking Your Medicine
Like many medicines, Isosorbide mononitrate may occasionally cause side-effects in some patients, particularly when you first start taking it. These may include flushing, dizziness, weakness, faintness on standing, dry, flaky skin rashes or fast or rarely slow heart rate. If you have a certain type of brain tumour Isosorbide mononitrate can make your symptoms
worse. Headaches are a common side effect and can be relieved with painkillers, they usually get better after 1-3 weeks of treatment. You should consult your doctor if these effects are troublesome or continue.
If you get any other unusual effects, tell your doctor immediately and seek advice.
Storing Your Medicine
Do not use the tablets after the expiry date shown. Keep the tablets below 25°C in a dry place and in the original packaging.
KEEP THEM IN A SECURE PLACE WHERE CHILDREN CANNOT GET AT OR SEE THEM. REMEMBER, this medicine is for YOU only. NEVER give it to anyone else. It may harm them, even if their symptoms are the same as yours. Unless your doctor tells you to, do not keep medicines that you no longer need - give them back to your pharmacist for safe disposal.
Date of last revision: January 2009
50227473
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