Dofax 500 Capsule

Dofetilide (500mcg)

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Dofax 500 Capsule is an antiarrhythmic medication used to help maintain a normal heart rhythm in people with atrial fibrillation (AF) or atrial flutter (AFL). It works by inhibiting the specific channel that controls heart rhythm and reducing irregular rhythms and related symptoms.

Written By Dr. Sakshi Jain, MS, BDS,
Reviewed By Dr. Rajeev Sharma, MBA, MBBS,
Last updated on 13 May 2026 | 06:02 PM (IST)

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General Information

Contains

Dofetilide (500mcg)

Marketer

Tas Med India Pvt Ltd

Storage

Store below 25°C

The content is shown in English

Product introduction

Take the medication exactly as directed, at the same times each day, without missing doses. Do not adjust or skip doses unless advised by your doctor. Regular, consistent use supports better heart rhythm control and treatment success.

Common side effects of Dofax 500 Capsule include headache, chest pain, and dizziness. These symptoms may vary from person to person. Inform the doctor if these symptoms get worse or last longer, and get medical advice if you experience any additional side effects.

Avoid the use of Dofax 500 Capsule if you have a history of renal impairment. If you have any other preexisting heart-related issues, consult your doctor, as this medication can affect heart rhythm. Regular monitoring of ECG (electrocardiogram) and kidney function is essential during treatment.

Let your doctor also know about all the medications you are taking, as some medicines may interact with Dofax 500 Capsule. Pregnant or breastfeeding women should consult their doctor before taking Dofax 500 Capsule to ensure safety.

Uses of Dofax Capsule

Treatment of Arrhythmia

Benefits of Dofax Capsule

Treatment of Arrhythmia
Dofax 500 Capsule is used to treat atrial fibrillation (AF) and atrial flutter (AFL) by helping maintain a normal, stable heart rhythm. By supporting regular heart function, it can reduce symptoms of arrhythmia (a heart-related disease), improving overall quality of life. When taken as prescribed and monitored carefully, Dofax 500 Capsule can help decrease the risk of arrhythmia-related complications, providing more heart rhythm stability and better day-to-day well-being.

Side effects of Dofax Capsule

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 Dofax

Headache
Chest pain
Dizziness

How to use Dofax Capsule

Take this medicine in the dose and duration as advised by your doctor. Dofax 500 Capsule may be taken with or without food.

How Dofax Capsule works

Dofax 500 Capsule belongs to a group of medications called class III antiarrhythmics, which help control irregular heart rhythms. Dofax 500 Capsule helps keep the heart beating steadily by inhibiting a specific channel that controls heart rhythm. This helps the heart reset properly between beats and prevents irregular heartbeats, like atrial fibrillation. Importantly, it works only on this specific channel and does not affect other heart functions, like sodium channels or heart receptors.

Quick tips

Take Dofax 500 Capsule exactly as prescribed, ideally at the same times each day.
Do not self-adjust the Dofax 500 Capsule dose as even small dose changes can affect heart rhythm.
Tell your doctor if you have kidney problems, as Dofax 500 Capsule dosing is adjusted based on kidney function to avoid serious heart risks.
Avoid starting or stopping any other medicines without consulting your doctor, especially diuretics or antibiotics, which may increase the risk of disturbance in the heart rhythm.
Limit grapefruit juice intake, as it may interfere with how your body processes this medicine.
Report any dizziness, fainting, or irregular heartbeat immediately, as these may signal dangerous changes in heart rhythm.

Safety advice

Alcohol

CONSULT YOUR DOCTOR

It is not known whether it is safe to consume alcohol with Dofax 500 Capsule. Please consult your doctor.

Pregnancy

CONSULT YOUR DOCTOR

The safety of Dofax 500 Capsule 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

Information regarding the use of Dofax 500 Capsule during breastfeeding is not available. Please consult your doctor.

Driving

UNSAFE

Dofax 500 Capsule may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

CAUTION

Dofax 500 Capsule should be used with caution in patients with kidney disease. Dose adjustment may be needed.

Liver

CAUTION

Dofax 500 Capsule should be used with caution in patients with severe liver disease. Dose adjustment may be needed.

Frequently asked questions

Can I stop taking Dofax 500 Capsule if I feel better?

No, you should not stop taking Dofax 500 Capsule without consulting your doctor, even if your symptoms improve.

Does Dofax 500 Capsule require any special monitoring?

Yes, regular ECG tests and kidney function checks are needed to monitor your heart rhythm and overall health.

What are the common side effects of Dofax 500 Capsule?

Headache, chest pain, and dizziness are common side effects. Contact your doctor if these symptoms worsen or persist.

Fact Box

Chemical Class

Sulfanilides

Habit Forming

Action Class

Class III Antiarrhythmics

References

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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: Tas Med India Pvt Ltd
Address: Plot No. 45, N.T.M., Sector -26, Chandigarh

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Dofax 500 Capsule. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India

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Why we need a prescription?

Dofax 500 Capsule

Cash on delivery

Free Return

Expiry after

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of Dofax Capsule

Benefits of Dofax Capsule

Side effects of Dofax Capsule

How to use Dofax Capsule

How Dofax Capsule works

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Frequently asked questions

Can I stop taking Dofax 500 Capsule if I feel better?

Does Dofax 500 Capsule require any special monitoring?

What are the common side effects of Dofax 500 Capsule?

Fact Box

Chemical Class

Habit Forming

Action Class

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

In case of any issues, contact us

Lab tests offered by us

Related/Popular tests