Does Alnitro 6.4mg Tablet CR stop heart attacks?

Alnitro 6.4mg Tablet CR is prescribed to prevent attacks of heart-related chest pain (angina) in patients with coronary artery disease. In this disease, the blood vessels (coronary arteries) that supply blood to the heart become narrowed, because of which the heart has to work harder to get enough oxygen. Alnitro 6.4mg Tablet CR prevents angina by relaxing the blood vessels so that the heart does not have to work very hard. Also, relaxation of the coronary arteries increases the oxygen supply to the heart.

ALNITRO 6.4MG TABLET CR

Nitroglycerin (6.4mg)

Nitroglycerin (6.4mg)Salt

Alnitro 6.4mg Tablet CR should be taken in the dose and duration as advised by your doctor. It may be taken with or without food, preferably at a fixed time each day. Do not consume more than the recommended dose, as this may have harmful effects on your body. 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 effect of this medicine is a headache, which may be severe. This can sometimes be helped by drinking plenty of fluids and avoiding alcohol. You may also experience lightheadedness, which could increase your risk of having a fall. There are other, rarer side effects, some of them serious. Ask your doctor and read the leaflet that comes with the medicine to make sure you are keeping safe. Do not use this medicine if you are taking medicines to treat high blood pressure in your lungs (pulmonary hypertension), erectile dysfunction, or if you have anemia or glaucoma (increased pressure inside the eye). Always tell your doctor what other health conditions you have and what other medicines you are taking. It is best not to drink alcohol with this medicine as it increases some of the side effects. If you are affected by dizziness, avoid driving. If you are pregnant, planning to become pregnant, or breastfeeding, ask your doctor before taking this medicine.

Commonly bought for:

SALT CATEGORY: GENERAL

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1 price found

PlatinumRxOut of stock₹214.50

No price found yet at PharmEasy, 1mg (Tata), Apollo, Netmeds, Truemeds, MedPlus. They may still stock it.

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medicationDosage & Packaging Details

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Dosage Form

Tablet CR

Manufacturer

Alnitro

Administration

Oral Route

Prescription

prescription

action class: Nitric Oxide (NO) Donorshabit forming: Notherapeutic class: CARDIAC

medical_informationMedicine & Clinical Information

check_circleUses & Indications

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Angina (heart-related chest pain)

lightbulbExpert Advice & Quick Tips

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arrow_rightAlnitro 6.4mg Tablet CR may cause dizziness or sleepiness. Do not drive or do anything that requires concentration until you know how it affects you.
arrow_rightDo not consume alcohol while taking Alnitro 6.4mg Tablet CR, as it may cause increased dizziness.
arrow_rightIt may cause headaches, which usually go away after a few days of continued treatment. Inform your doctor if it persists.
arrow_rightYou may develop tolerance to Alnitro 6.4mg Tablet CR with time, meaning that the same dose may be less effective next time. Follow the prescribed dosing schedule to avoid this.
arrow_rightStop taking medications (prescribed for erectile dysfunction) like sildenafil or tadalafil while on treatment with Alnitro 6.4mg Tablet CR, as it may cause low blood pressure.

scienceMechanism of Action (How it works)

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Alnitro 6.4mg Tablet CR is a nitrate. It works by relaxing the blood vessels and increasing the supply of blood and oxygen to the heart while reducing its workload, thereby preventing/treating attacks of angina (chest pain).

infoDirections for Use (How to Use)

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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. Alnitro 6.4mg Tablet CR may be taken with or without food.

historyMissed Dose Instructions

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If you miss a dose of Alnitro 6.4mg Tablet CR, 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.\n

warningSide Effects

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Headache

helpFrequently Asked Questions

Can I take sildenafil if I am taking Alnitro 6.4mg Tablet CR?

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No, you should not take sildenafil if you are taking Alnitro 6.4mg Tablet CR. Taking these two medicines together can cause an excessive fall in blood pressure, which may even be life-threatening.

What effect does Alnitro 6.4mg Tablet CR have on blood pressure?

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Alnitro 6.4mg Tablet CR decreases the blood pressure by relaxing the blood vessels, but is not recommended for the treatment of high blood pressure. The drop in blood pressure may cause lightheadedness, especially when changing your position suddenly.

Does the effect of Alnitro 6.4mg Tablet CR wear off after some time?

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Yes, excessive use of Alnitro 6.4mg Tablet CR may cause tolerance, which means that Alnitro 6.4mg Tablet CR may lose its effectiveness on you. Therefore, usually the doctors prescribe the smallest dose required for effective relief of an acute angina attack. This helps maintain the effectiveness of Alnitro 6.4mg Tablet CR.

What does too much Alnitro 6.4mg Tablet CR do?

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Excess Alnitro 6.4mg Tablet CR may result in low blood pressure, sweating, nausea, vomiting, headache, weak and fast pulse. It may also cause weakness, lightheadedness on standing, and the patient might even faint. The patient will require emergency medical treatment in such a case.

Can I stop using Alnitro 6.4mg Tablet CR as I feel better now?

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Stopping Alnitro 6.4mg Tablet CR suddenly may bring on attacks of angina, especially if you have been using it for several weeks or more. Talk to your doctor, who will advise you to reduce the dose gradually over 4 to 6 weeks before you stop using it completely.

Editorial & Medical Review

The information on this page has been compiled and reviewed by healthcare professionals and data editors to ensure accuracy. It is for informational and price-comparison purposes only and should not replace professional medical advice.

Written By

MediSaathi Editorial Team

Last Updated

June 21, 2026

Regularly reviewed

Data Sources & Citations

Central Drugs Standard Control Organisation (CDSCO) — Government of IndiaView Source
National Pharmaceutical Pricing Authority (NPPA) — Government of IndiaView Source
Jan Aushadhi Scheme — Pradhan Mantri Bhartiya Janaushadhi Pariyojana — Government of IndiaView Source

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Is ALNITRO 6.4MG TABLET CR available at a cheaper price in India?

Price Summary for ALNITRO 6.4MG TABLET CR

ALNITRO 6.4MG TABLET CR

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Doctor Consultation Required

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Editorial & Medical Review

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