Dofax 125 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.
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 125 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 125 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 125 Capsule. Pregnant or breastfeeding women should consult their doctor before taking Dofax 125 Capsule to ensure safety.
Dofax 125 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 125 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 125 Capsule may be taken with or without food, but it is better to take it at a fixed time.
How Dofax Capsule works
Dofax 125 Capsule belongs to a group of medications called class III antiarrhythmics, which help control irregular heart rhythms. Dofax 125 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.
Safety advice
Alcohol
CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Dofax 125 Capsule. Please consult your doctor.
Pregnancy
CONSULT YOUR DOCTOR
Dofax 125 Capsule may be unsafe to use during pregnancy. Although there are limited studies in humans, animal studies have shown harmful effects on the developing baby. Your doctor will weigh the benefits and any potential risks before prescribing it to you. Please consult your doctor.
Breast feeding
CONSULT YOUR DOCTOR
Information regarding the use of Dofax 125 Capsule during breastfeeding is not available. Please consult your doctor.
Driving
CONSULT YOUR DOCTOR
It is not known whether Dofax 125 Capsule alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react.
Kidney
CAUTION
Dofax 125 Capsule should be used with caution in patients with kidney disease. Dose adjustment of Dofax 125 Capsule may be needed. Please consult your doctor.
Liver
CAUTION
Dofax 125 Capsule should be used with caution in patients with severe liver disease. Dose adjustment of Dofax 125 Capsule may be needed. Please consult your doctor.
What if you forget to take Dofax Capsule?
If you miss a dose of Dofax 125 Capsule, 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.
All substitutes
For informational purposes only. Consult a doctor before taking any medicines.
No substitutes found for this medicine
Quick tips
Take Dofax 125 Capsule exactly as prescribed, ideally at the same times each day.
Do not self-adjust the Dofax 125 Capsule dose as even small dose changes can affect heart rhythm.
Tell your doctor if you have kidney problems, as Dofax 125 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.
Fact Box
Chemical Class
Sulfanilides
Habit Forming
No
Action Class
Class III Antiarrhythmics
Patient concerns
The ecg report is Sinus Arrhythmia and short PR interval. What does it mean?
Having difficulty in getting full erections. I take concor 1.25 and roseday 10 as prescribed for arrhythmia. What can be prescribed to me ?
Dr. Pranay Gandhi
Sexology
Treatment for erectile dysfunction: 1.stop smoking and alcohol 2.join a gym and reduce weight. Do weight lifting exercises. 3.tablet sildenafil or viagra 1 tablet 1 hour before sexual activity. 4.Get tested so that u don?t have any of the following causes: 1.heart diseases 2. diabetes 3.neurological problems 4.hormonal problems 5.drug side effects
Can I stop taking Dofax 125 Capsule if I feel better?
No, you should not stop taking Dofax 125 Capsule without consulting your doctor, even if your symptoms improve.
Does Dofax 125 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 125 Capsule?
Headache, chest pain, and dizziness are common side effects. Contact your doctor if these symptoms worsen or persist.
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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.
References
Dofetilide [Package Insert]. New York, NY: Pfizer Labs; 2013. [Accessed 13 Feb. 2025] (online) Available from:
Dofetilide [Package Insert]. New York, NY: Pfizer Labs; 2023. [Accessed 13 Feb. 2025] (online) Available from:
Dofetilide [Prescribing Information]. New York, NY: Pfizer Labs; 2025. [Accessed 25 Feb. 2025] (online) Available from:
Central Drugs Standard Control Organisation: List of new drugs approved in the year 2020 till date. [Accessed 25 Feb. 2025] (online) Available from: