Medication Information Leaflet
This medication is used to suppress and prevent the recurrence of abnormal heart rhythm. It works by slowing an overactive heart and correcting irregular heartbeats to a normal rhythm so that the heart works properly to pump blood.
Do not stop taking your medication without checking with your healthcare professional.
You may take this medication with or without food.
The doctor may adjust the dose based on your condition. Do not take this medication more often than directed and do not stop until instructed by your doctor.
For tablets: Swallow tablet with a glass of water. Do not crush, break, or chew the tablet.
For liquid medicine: Shake well before using. Use a medicine spoon or the graduated oral syringe provided to measure out the correct amount. Do not use household spoons as they may not be accurate.
Separate the administration of flecainide from the following food by at least 1-2 hours as it may affect the absorption of flecainide:
Milk (including Breast milk and infant formula)
Dairy products (e.g. Cheese, yoghurt)
For babies / infants, report any changes in dietary milk intake to the doctor as dose adjustments may be needed.
If you forget to take a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose. Then take your next dose at the usual time. Do not take two doses to make up for the missed dose.
Inform your healthcare professional if:
You are allergic to this medication or any of the other ingredients of this medication.
You are pregnant, planning to become pregnant, or breastfeeding.
You are taking any other medications, including supplements, traditional medications and herbal remedies.
You have kidney or liver disease.
You have a heart condition known as heart failure, or recently had a heart attack.
You have a pacemaker or defibrillator.
Problems with your vision – sudden change (blurring) in eyesight, yellow vision
Nausea, vomiting, stomach upset (constipation, diarrhea)
For infants and young children, blood tests may be required to monitor the level of flecainide. A gene test may also be required to guide drug dosing and for making dose adjustments.
It is very important that you are on regular follow-up with your doctor to monitor for any possible side-effects. Inform your healthcare professional if you have any of the following side-effects.
This medication may worsen existing abnormal heart rhythm, or cause new irregular heartbeats. Symptoms of abnormal heart rhythm include one or more of the following:
Irregular heartbeat e.g. slowed heartbeat or palpitations
Severe dizziness or fainting spells
Difficulties in breathing or chest pain
The symptoms of a drug allergy include one or more of the following:
Difficulty in breathing
Itchy skin rashes over your whole body
If you experience any of these symptoms, you should stop your medication and see your healthcare professional immediately.
Some medications may interact with Flecainide and affect their effectiveness or increase the risk of side-effects. However, these medications may also be important for your treatment. Inform your healthcare professional of the other medications you are currently taking. Examples include:
Medications for bacterial infections (e.g. clarithromycin, erythromycin)
Medications for fungal infections (e.g. itraconazole, ketoconazole)
Medications for viral infections (e.g. Ritonavir)
Consult your healthcare professional if you are unsure whether your existing medications can be taken together with this medication.
For tablets: Store in a cool and dry place, away from direct sunlight.
For liquid medicine: Store in the refrigerator between 2-8℃. Do not freeze.
Keep this medication away from children.
This article was last reviewed on
Tuesday, July 6, 2021
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