Isocrate 20mg Tablet

Isosorbide Dinitrate (20mg)

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Isocrate 20mg Tablet is used to prevent chest pain (angina attacks). It works by relaxing and widening blood vessels so blood can flow more easily to the heart. These tablets will not treat an angina attack that has already begun. They may be also used to control heart failure.

Written By Dr. Lipika Khurana, PGDHHM, BDS,
Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS,
Last updated on 25 Nov 2025 | 03:05 PM (IST)

₹26.6 MRP ₹29.189% off

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General Information

Contains

Isosorbide Dinitrate (20mg)

Marketer

Roussel Laboratories Pvt Ltd

Storage

Store below 30°C

The content is shown in English

Product introduction

Isocrate 20mg Tablet should be taken on an empty stomach. It is best taken at the same time every day. Your doctor will decide the dose and the number of times each day you should take them. You should take the medicine as it is prescribed for you and keep taking it, even if you feel well. If you stop taking it suddenly your risk of an angina attack will increase. Lifestyle changes such as diet, exercise, and not smoking may help this drug 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 a really specific dosing schedule to prevent this from happening.

The most common side effects of this medicine include headache and lightheadedness. These may disappear once you have got used to the medicine. If you are worried, or the symptoms do not go away, let your doctor know. Some of these can be reduced by taking painkillers, drinking plenty of fluids, and avoiding alcohol. Alcohol may increase some side effects (dizziness, drowsiness, feeling light-headed, or fainting). Medical tests (such as blood pressure) may be required to monitor your progress and check for side effects.

Uses of Isocrate Tablet

Angina (heart-related chest pain)

Benefits of Isocrate Tablet

Angina (heart-related chest pain)
Isocrate 20mg Tablet reduces your risk of getting heart related chest pain (angina attack). It does not treat an angina attack that has already begun and should not be used for this purpose. It works by relaxing and widening blood vessels in the heart. This makes it easier for blood to flow to the heart, so it gets more oxygen. This medicine thus helps to increase your ability to exercise and go about your daily life more easily and confidently. It should be taken regularly to be effective.

Side effects of Isocrate Tablet

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 Isocrate

Headache

How to use Isocrate Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Isocrate 20mg Tablet is to be taken on an empty stomach.

How Isocrate Tablet works

Isocrate 20mg Tablet is a nitrate. It works by relaxing the blood vessels which decreases the oxygen demand of the heart and reduces its workload. It thus prevents/treats attacks of angina (chest pain).

Quick tips

Eat healthy (low-fat, high-fiber, low-sodium diet), quit smoking, increase your physical activity, watch your weight and reduce stress.
Isocrate 20mg Tablet may cause dizziness or sleepiness. Do not drive or do anything that requires concentration until you know how it affects you.
Do not consume alcohol while taking Isocrate 20mg Tablet as it may cause increased dizziness.
It may cause headaches which usually go away after a few days of continued treatment. Inform your doctor if it persists.
You may develop tolerance to Isocrate 20mg Tablet with time, meaning that the same dose may be less effective next time. Follow the prescribed dosing schedule to avoid this.
Stop taking medications (prescribed for erectile dysfunction) like sildenafil or tadalafil while on treatment with Isocrate 20mg Tablet as it may cause low blood pressure.
You have been prescribed Isocrate 20mg Tablet for the prevention and treatment of heart-related chest pain (angina).
Eat healthy (low-fat, high-fiber, low-sodium diet), quit smoking, increase your physical activity, watch your weight and reduce stress.
Isocrate 20mg Tablet may cause dizziness or sleepiness. Do not drive or do anything that requires concentration until you know how it affects you.
Do not consume alcohol while taking Isocrate 20mg Tablet as it may cause increased dizziness.
It may cause headaches which usually go away after a few days of continued treatment. Inform your doctor if it persists.
You may develop tolerance to Isocrate 20mg Tablet with time, meaning that the same dose may be less effective next time. Follow the prescribed dosing schedule to avoid this.
Stop taking medications (prescribed for erectile dysfunction) like sildenafil or tadalafil while on treatment with Isocrate 20mg Tablet as it may cause low blood pressure.

Safety advice

Alcohol

UNSAFE

Consumption of alcohol with Isocrate 20mg Tablet may cause a disulfiram-like reaction, leading to symptoms such as flushing, increased heart rate, low blood pressure, nausea, lightheadedness, and severe headache.

Pregnancy

CONSULT YOUR DOCTOR

The safety of Isocrate 20mg Tablet 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

SAFE IF PRESCRIBED

Isocrate 20mg Tablet may be safe to use during breastfeeding. Animal studies have shown low or no adverse effects to the developing baby; however, there are limited human studies.

Driving

UNSAFE

Isocrate 20mg Tablet may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

SAFE IF PRESCRIBED

Isocrate 20mg Tablet is safe to use in patients with kidney disease. No dose adjustment is recommended.
However, inform your doctor if you have an underlying kidney disease.

Liver

SAFE IF PRESCRIBED

Isocrate 20mg Tablet is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

Interaction with drugs

Taking Isocrate 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 Dinitrate. If Sildenafil is essential, ensure a gap of at least 24 hours after discontinuing Isosorbide Dinitrate. Please consult your doctor.

Life-threatening

Tadalafil (Oral Route)

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

Life-threatening

Sildenafil (Oral Route)

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

Life-threatening

Sildenafil (Injection Route)

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

Life-threatening

Sildenafil (Injection Route)

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

Frequently asked questions

What is Isocrate 20mg Tablet and what is it used for?

Isocrate 20mg Tablet belongs to a group of medicines called organic nitrates. Isocrate 20mg Tablet is used to prevent and treat angina pectoris and as an adjunctive treatment in severe acute or chronic congestive cardiac failure.

How does Isocrate 20mg Tablet work?

Isocrate 20mg Tablet works by widening the blood vessels in your heart to allow an increased amount of blood flow to areas which need it.

Does Isocrate 20mg Tablet lower heart rate?

No, Isocrate 20mg Tablet does not lower heart rate. However, in some cases, one may experience reflex tachycardia (fast heart rate) while using nitrates such as Isocrate 20mg Tablet.

Does Isocrate 20mg Tablet lower blood pressure?

Yes, Isocrate 20mg Tablet lowers blood pressure. This medicine widens the blood vessels and decreases the resistance in them, causing a fall in blood pressure. This fall in blood pressure may in turn decrease the heartbeat which can lead to angina. This medicine should be avoided in people who already have low blood pressure. Discuss with your doctor if you have any concerns.

Can I take sildenafil while taking Isocrate 20mg Tablet?

No, you should not take sildenafil along with Isocrate 20mg Tablet. Both these medicines lower blood pressure and belong to the same class. Taking these two medicines together may cause significant decrease in blood pressure which can cause fainting or even a heart attack. Along with this, avoid taking other medicines which belong to the same class such as vardenafil and tadalafil.

Fact Box

Chemical Class

Nitrates

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. pp. 743-44.
Isosorbide dinitrate. Cologne, Germany: MEDA Manufacturing GmbH; 2015. [Accessed 19 Mar. 2019] (online) Available from:
Central Drugs Standard Control Organisation (CDSCO). [Accessed 19 Mar. 2019] (online) Available from:

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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: Roussel Laboratories Pvt Ltd
Address: godown no. b/19 part-2, gujrat estate sarkhej sanand road, sarkhej ahmedabad ahmedabad gj 382210 in

Vendor Details

Country of origin: India

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Isocrate 20mg Tablet

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General Information

Contains

Marketer

Storage

Product introduction

Uses of Isocrate Tablet

Benefits of Isocrate Tablet

Side effects of Isocrate Tablet

How to use Isocrate Tablet

How Isocrate Tablet works

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 Isocrate 20mg Tablet and what is it used for?

How does Isocrate 20mg Tablet work?

Does Isocrate 20mg Tablet lower heart rate?

Does Isocrate 20mg Tablet lower blood pressure?

Can I take sildenafil while taking Isocrate 20mg Tablet?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

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