Imdur 30mg Tablet PR

Isosorbide Mononitrate (30mg)

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Product Summary :

Imdur 30mg Tablet PR contains isosorbide mononitrate (a nitrate vasodilator) used to prevent angina (heart-related chest pain). It works by relaxing and widening blood vessels, improving blood flow to the heart, and reducing its workload. Take it regularly as prescribed to prevent angina attacks; it is not meant for immediate relief of sudden chest pain. Common side effects include headache, dizziness, flushing, and low blood pressure. Avoid use with medicines for erectile dysfunction (such as sildenafil), as this may cause a dangerous drop in blood pressure.

Written By Dr. Anuj Saini, MMST, MBBS,
Reviewed By Dr. Rajeev Sharma, MBA, MBBS,
Last updated on 09 May 2026 | 06:33 PM (IST)

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General Information

Contains

Isosorbide Mononitrate (30mg)

Marketer

AstraZeneca

Storage

Store below 25°C

The content is shown in English

Product introduction

Imdur 30mg Tablet PR is used to prevent heart-related chest pain (angina). It works by relaxing and widening blood vessels so blood can flow more easily to the heart. This medicine will not treat an angina attack that has already begun.

Imdur 30mg Tablet PR may be taken with or without food. Your doctor will decide the dose and how often you should take it. The dose may change from time to time depending on how well the medicine works. Take this medicine exactly as prescribed and continue taking it even if you feel well. It helps prevent chest pain in the future. If you stop taking it, your risk of chest pain may increase, especially if you stop suddenly. Lifestyle changes such as a healthy diet, regular exercise, and avoiding smoking may help this medicine work better.

You can develop tolerance to this medicine over time, which means that the same dose becomes less effective. You have to stick to dosing schedule to prevent this from happening.

The most common side effects include headache, flushing, upper respiratory tract infection, abdominal pain, allergic reaction, chest pain, and diarrhea. If these symptoms bother you or do not go away, your doctor may suggest ways of preventing or reducing them. Some can be reduced by taking painkillers, drinking plenty of fluids, and avoiding alcohol.

Before taking Imdur 30mg Tablet PR, tell your doctor if you have low blood pressure, glaucoma (increased pressure in the eye), kidney disease, or heart failure. Also, inform your doctor about any other medicines you are taking, as some may interact with this medicine or make it unsafe to use together. Do not take medicines for erectile dysfunction while using this medicine. If you are pregnant or breastfeeding, ask your doctor whether this medicine is suitable for you. Your doctor may regularly monitor your blood pressure and heart rate during treatment.

Uses of Imdur Tablet PR

Treatment of Angina (heart-related chest pain) : Imdur 30mg Tablet PR helps improve blood flow to the heart and relieve chest pain or discomfort caused by reduced oxygen supply to the heart muscle.

Benefits of Imdur Tablet PR

Treatment of Angina (heart-related chest pain)
Angina is chest pain caused by reduced blood flow to the heart muscle, usually due to narrowed coronary arteries. Imdur 30mg Tablet PR helps by relaxing and widening blood vessels, which improves blood flow and oxygen supply to the heart. This helps relieve chest discomfort and reduces the risk of angina attacks.

Side effects of Imdur Tablet PR

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Imdur

Headache
Flushing (sense of warmth in the face, ears, neck and trunk)
Upper respiratory tract infection
Abdominal pain
Chest pain
Diarrhea

How to use Imdur Tablet PR

Use it as advised by your doctor or check the label for directions before use. Imdur 30mg Tablet PR may be taken with or without food.

How Imdur Tablet PR works

Imdur 30mg Tablet PR is a nitrate. It dilates peripheral arteries and veins. Dilation of the veins promotes peripheral pooling of blood and decreases venous return to the heart, thereby reducing the workload of the heart. As a result, the heart muscle does not need as much blood and oxygen supply.

Dosage

The dose of Imdur 30mg Tablet PR depends on your condition, your response to treatment, and your overall health. It is usually taken once or twice a day to help prevent chest pain related to heart conditions. However, your doctor will decide the right dose and duration of treatment for you.

Take Imdur 30mg Tablet PR exactly as prescribed and try to take it at the same time each day. Do not take more than the recommended dose, and do not stop using it suddenly without consulting your doctor. Continue using it regularly as advised to help manage your condition effectively.

Missed Dose

If you miss a dose of Imdur 30mg Tablet PR, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.

Overdose

Overdose may result in throbbing headache, confusion, moderate fever, vertigo, palpitations, visual disturbances, nausea and vomiting (possibly with colic and even bloody diarrhea), syncope (especially in the upright posture), difficulty in breathing, seizures, and even death.

If overdose is suspected, seek medical help immediately.

All substitutes for Imdur 30mg Tablet PR

For information purposes only. Consult a doctor before taking any medicine.

Nitrofix SR 30 Tablet

by Micro Labs Ltd

₹5.16/tablet pr

12% cheaper

Monotrate SR 30 Tablet

by Sun Pharmaceutical Industries Ltd

₹6.78/tablet pr

16% costlier

Quick tips

Take Imdur 30mg Tablet PR exactly as prescribed and at the same time each day to maintain its effectiveness and reduce tolerance.
Imdur 30mg Tablet PR may cause dizziness or light-headedness, so avoid driving or operating machinery until you know how it affects you.
Stand up slowly from sitting or lying positions, as this medicine may cause a drop in blood pressure and dizziness.
Avoid alcohol while taking Imdur 30mg Tablet PR, as it may increase dizziness or light-headedness.
Headache is a common side effect when starting Imdur 30mg Tablet PR, and it usually improves with continued use; inform your doctor if it becomes severe or persistent.
Do not take medicines for erectile dysfunction (such as sildenafil or tadalafil) while using Imdur 30mg Tablet PR, as this combination can cause a dangerous drop in blood pressure.
Imdur 30mg Tablet PR is usually used to prevent angina attacks and not for immediate relief; seek urgent medical attention if you develop sudden or severe chest pain.
Follow the prescribed dosing schedule carefully, as tolerance to nitrates may develop if dosing instructions are not followed properly.
Maintain heart-healthy lifestyle habits, such as a balanced diet, regular physical activity, weight control, stress reduction, and avoiding smoking.
Consult your doctor if you experience severe weakness, fainting, confusion, or persistent symptoms while taking Imdur 30mg Tablet PR.

Safety advice

Alcohol

CAUTION

Alcohol should be used with caution while taking Imdur 30mg Tablet PR.

Pregnancy

CONSULT YOUR DOCTOR

The safety of Imdur 30mg Tablet PR during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.

Breast feeding

CONSULT YOUR DOCTOR

Imdur 30mg Tablet PR may be unsafe to use during breastfeeding. Limited human data suggests that the drug may pass into the breastmilk and harm the baby. It should be used only if the expected benefit outweighs the potential risk. Please consult your doctor.

Driving

UNSAFE

Imdur 30mg Tablet PR may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

SAFE IF PRESCRIBED

Imdur 30mg Tablet PR is safe to use in patients with kidney disease. No dose adjustment is recommended.
However, talk to your doctor if you have any underlying kidney disease.

Liver

SAFE IF PRESCRIBED

Imdur 30mg Tablet PR is safe to use in patients with liver disease. No dose adjustment is recommended.

Interaction with drugs

Taking Imdur with any of the following medicines can modify the effect of either of them and cause some undesirable side effects

Life-threatening

Sildenafil (Oral Route)

Do not consume Sildenafil with Isosorbide Mononitrate. If Sildenafil is essential, ensure a gap of at least 24 hours after discontinuing Isosorbide Mononitrate. Please consult your doctor.

Life-threatening

Tadalafil (Oral Route)

Do not consume Tadalafil with Isosorbide Mononitrate. If Tadalafil is essential, ensure a gap of at least 48 hours between taking Tadalafil and Isosorbide Mononitrate.

Life-threatening

Sildenafil (Oral Route)

Do not consume Sildenafil with Isosorbide Mononitrate. If Sildenafil is essential, ensure a gap of at least 24 hours after discontinuing Isosorbide Mononitrate. Please consult your doctor.

Life-threatening

Sildenafil (Injection Route)

Do not consume Sildenafil with Isosorbide Mononitrate. If Sildenafil is essential, ensure a gap of at least 24 hours after discontinuing Isosorbide Mononitrate. Please consult your doctor.

Life-threatening

Sildenafil (Injection Route)

Do not consume Sildenafil with Isosorbide Mononitrate. If Sildenafil is essential, ensure a gap of at least 24 hours after discontinuing Isosorbide Mononitrate. Please consult your doctor.

Frequently asked questions

What is Imdur 30mg Tablet PR and what is it used for?

Imdur 30mg Tablet PR is a medicine used to help prevent angina, which is chest pain caused by reduced blood flow to the heart. It works by relaxing and widening the blood vessels, allowing blood to flow more easily to the heart and reducing the heart’s workload. This helps prevent episodes of chest pain during daily activities. However, Imdur 30mg Tablet PR is not intended to relieve sudden angina attacks once they have started. Because the medicine can lower blood pressure, some people may feel dizzy or light-headed, especially when standing up quickly.

Does Imdur 30mg Tablet PR affect heart rate?

Imdur 30mg Tablet PR may affect heart rate in some people. Because the medicine lowers blood pressure by widening blood vessels, the body may respond by increasing the heart rate (reflex tachycardia) in some cases. These changes are usually mild, but if you notice a significant change in heart rate or feel unwell after taking the medicine, you should consult your doctor.

How quickly does Imdur 30mg Tablet PR start working?

Imdur 30mg Tablet PR may begin working the same day you start taking it, but its main purpose is to prevent angina over time rather than provide immediate symptom relief. The medicine releases its active ingredient slowly to maintain a steady protective effect. Because it works gradually, you may not feel any immediate difference even though it is helping protect your heart.

When should I take Imdur 30mg Tablet PR?

Imdur 30mg Tablet PR is usually taken once daily in the morning unless your doctor recommends a different schedule. Taking it at the same time every day helps maintain a consistent effect in the body. Doctors often schedule the dose in a way that allows a daily nitrate-free interval, which helps prevent the body from becoming tolerant to the medicine. If your doctor prescribes it twice daily, the doses are usually spaced several hours apart.

What should I do if I miss a dose of Imdur 30mg Tablet PR?

If you forget to take a dose of Imdur 30mg Tablet PR, take it as soon as you remember, as long as it is within about 12 hours of the scheduled time. If more than 12 hours have passed, skip the missed dose and take the next dose at the usual time. Do not take two doses at the same time to make up for a missed one.

What is the most common side effect of Imdur 30mg Tablet PR?

Headache is one of the most common side effects of Imdur 30mg Tablet PR. Some people may also experience flushing, dizziness, or symptoms of low blood pressure. These effects occur because the medicine widens blood vessels. Headaches often improve as the body adjusts to the medication. If headaches are severe or persistent, consult your doctor.

Can I stop taking Imdur 30mg Tablet PR on my own?

You should not stop taking Imdur 30mg Tablet PR without consulting your doctor. Stopping the medicine suddenly may increase the risk of angina attacks. If you have concerns about side effects or the need for the medication, speak with your doctor before making any changes.

What are the symptoms of an overdose of Imdur 30mg Tablet PR?

Taking more than the recommended dose of Imdur 30mg Tablet PR may cause symptoms such as a severe throbbing headache, flushing of the skin, sweating, chills, nausea, vomiting, or a rapid heartbeat. If an overdose is suspected, seek emergency medical help immediately and contact your doctor.

What should I avoid while taking Imdur 30mg Tablet PR?

While taking Imdur 30mg Tablet PR, avoid using medicines for erectile dysfunction such as sildenafil, tadalafil, or vardenafil unless your doctor specifically approves them. Combining these medicines can cause a dangerous drop in blood pressure. Alcohol should also be limited because it may increase dizziness or light-headedness. Rise slowly from sitting or lying positions to reduce the risk of fainting.

Does Imdur 30mg Tablet PR cause sleepiness?

Imdur 30mg Tablet PR does not usually cause direct sleepiness. However, some people may feel dizzy or tired due to its blood pressure–lowering effect. If you feel faint or unsteady after taking the medicine, avoid driving or operating machinery until you feel better. If these symptoms persist, consult your doctor.

Can Imdur 30mg Tablet PR affect the kidneys or liver?

Imdur 30mg Tablet PR is not commonly known to directly harm the kidneys or liver. However, if blood pressure drops too low or if dehydration occurs, kidney function may be affected in some people. Maintaining adequate fluid intake and following your doctor’s advice can help reduce this risk. If you notice reduced urination, repeated dizziness, or unusual symptoms while taking Imdur 30mg Tablet PR, consult your doctor.

Fact Box

Chemical Class

Isosorbides

Habit Forming

Therapeutic Class

CARDIAC

Action Class

Nitric Oxide (NO) Donors

References

Opie LH, Horowitz JD. Nitrates and Newer Antianginals β-Blocking Agents. In: Opie LH, Gersh BJ, editors. Drugs for the Heart. 8th ed. Philadelphia, Pennsylvania: Elsevier Saunders; 2013. p. 47.
Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. p. 744.
Central Drugs Standard Control Organisation (CDSCO). [Accessed 19 Mar. 2019] (online). Available from:
Central Drugs Standard Control Organisation. Isosorbide Mononitrate. [Accessed 05 Jul. 2023]. (online). Available from:
National Health Service. Isosorbide mononitrate and isosorbide dinitrate. [Last Reviewed: 1 Jul. 2021]. [Accessed 05 Jul. 2023]. (online). Available from:
Isosorbide mononitrate tablet [Prescribing Information]. Dupnitsa, Bulgaria: Balkanpharma - Dupnitsa AD; 2022. [Accessed 05 Jul. 2023]. (online). Available from:
Isosorbide mononitrate tablet [Prescribing Information]. Castleford, UK: Teva UK Ltd.; 2022. [Accessed 07 Jan. 2026]. (online). Available from:

User feedback

Patients taking Imdur 30mg Tablet PR

Once A Day

83%

Twice A Day

17%

What are you using Imdur Tablet PR for?

Angina (heart-related chest pain)

84%

Others

14%

Heart failure

How much was the improvement?

Excellent

56%

Average

33%

Poor

11%

What were the side-effects while using Imdur 30mg Tablet PR?

Increased heart rate

43%

No Side Effect

14%

Orthostatic hypotension (sudden lowering of blood pressure on standing)

14%

Headache

14%

Dizziness

14%

How do you take Imdur Tablet PR?

With food

44%

Empty stomach

33%

With or without food

22%

Please rate Imdur 30mg Tablet PR on price

Expensive

67%

Average

25%

Not Expensive

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Disclaimer

Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: AstraZeneca
Address: Corporate & Registered Office, Block N1, 12th Floor, Manyata Embassy Business Park, Rachenahalli, Outer Ring Road, 560045, Bangalore

Vendor Details

Country of origin: India

Lab tests offered by us

Why we need a prescription?

Imdur 30mg Tablet PR

Product Summary :

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of Imdur Tablet PR

Benefits of Imdur Tablet PR

Side effects of Imdur Tablet PR

How to use Imdur Tablet PR

How Imdur Tablet PR works

Dosage

Missed Dose

Overdose

All substitutes for Imdur 30mg Tablet PR

Nitrofix SR 30 Tablet

Monotrate SR 30 Tablet

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Sildenafil (Oral Route)

Tadalafil (Oral Route)

Sildenafil (Oral Route)

Sildenafil (Injection Route)

Sildenafil (Injection Route)

Frequently asked questions

What is Imdur 30mg Tablet PR and what is it used for?

Does Imdur 30mg Tablet PR affect heart rate?

How quickly does Imdur 30mg Tablet PR start working?

When should I take Imdur 30mg Tablet PR?

What should I do if I miss a dose of Imdur 30mg Tablet PR?

What is the most common side effect of Imdur 30mg Tablet PR?

Can I stop taking Imdur 30mg Tablet PR on my own?

What are the symptoms of an overdose of Imdur 30mg Tablet PR?

What should I avoid while taking Imdur 30mg Tablet PR?

Does Imdur 30mg Tablet PR cause sleepiness?

Can Imdur 30mg Tablet PR affect the kidneys or liver?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

References

User feedback

Patients taking Imdur 30mg Tablet PR

What are you using Imdur Tablet PR for?

How much was the improvement?

What were the side-effects while using Imdur 30mg Tablet PR?

How do you take Imdur Tablet PR?

Please rate Imdur 30mg Tablet PR on price

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

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