FlecainidePrices, Coupons & Savings

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*Based on the difference between the U&C price submitted and the price the patient paid, as of April 2023.

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  2. Flecainide Acetate
    Generic for Tambocor
    30 tablets $5.1 USD
    Save $48.00
  3. Flecainide Acetate
    Generic for Tambocor
    60 tablets $6.3 USD
    Save $99.90
  4. Flecainide Acetate
    Generic for Tambocor
    90 tablets $8.1 USD
    Save $151.20
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Do you need a prescription for flecainide?

Yes, flecainide is only available with a valid physician Rx.

How much is flecainide without Insurance in the US?

Our website gives two competitive savings options to US customers who wish to purchase flecainide, as either a brand or generic, if available. The first is access to medications through our mail-order online pharmacy. The second is by using the Now Patient Rx Advantage Card, which can be used in over 65,000 pharmacies nationwide, across America. If you are insured, then in most cases, the cash price will be significantly cheaper than the copay.

What will my out-of-pocket cost be for flecainide in the US?

There are no out-of-pocket (OOP) costs because we are currently only offering a cash-based option to purchase medications.

Is Now Patient a flecainide savings card?

Yes. Save up to 90% on your flecainide with the FREE Now Patient Rx Advantage card*.
*Based on the difference between the U&C submitted by the pharmacy and the price the patients pay.

Can you handle Rx transfers for home delivery in the US?

Yes. If you use the mail-order online pharmacy option, then we can handle requests by you to have your prescription transferred to our pharmacy for home delivery. We can even help you manage your refills by giving you timely reminders, so you do not run out of your medication.

Is Now Patient a flecainide coupon provider in the US?

No. Now Patient does not provide flecainide coupons or FREE flecainide samples.

Do you accept commercial, Medicare or Medicaid coverage for flecainide in the US?

No. Currently, we only offer cash-based options for purchase, therefore we do not require your insurance benefit details. In the future, our plan is to be able to handle commercial insurance, Medicare and Medicaid including cases where you have multiple health plans that provide benefit coverage (e.g. Medicaid and Commercial). We also anticipate being able to handle more complex scenarios such as using primary insurance combined with a manufacturer copay assistance program.

Does Now Patient work with Medicare?

Our cash-based prices for medications are typically cheaper than Medicare copays. We do not bill Medicare Part D (standalone drug coverage) or Medicare Advantage (combined health and drug coverage). When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

Does Now Patient work with Commercial Insurance?

Our cash-based prices for medications are typically cheaper than commercial plan copays. We do not bill your commercial plan. When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

What should you do if you use too much flecainide?


Call your doctor right away or seek immediate medical attention if your symptoms do not improve or they become worse after using flecainide. You can also call 800-222-1222 to reach the American Association of Poison Control Centers or use its online resource if you think you’ve used too much flecainide. But if you have severe symptoms, call 911 (or your local emergency number) immediately or go to the nearest emergency room.


If you think it is an emergency, call 999 or find your nearest A&E
If you need help now, but it’s not an emergency go to 111.nhs.uk or call 111. Alternatively you can speak to one of our pharmacists or use the Now Patient app to make an appointment with your GP.

What should I do if I miss my dose?

There are occasions when people forget to take their medication at correct prescribed times. This may not only have an effect on potentially making the medication less effective but it may also inadvertently lead to taking doses too close together, thereby increasing the risks of side effects.

Click here to find out what to do if you forgot to take your medication

What is generic flecainide?

Generic flecainide refers to the non-brand-name version of the medication. It contains the same active ingredient as the brand-name drug but is typically less expensive.

FDA approval of flecainide

Flecainide is approved by the U.S. Food and Drug Administration (FDA) for the treatment of certain types of irregular heart rhythms, including atrial fibrillation and ventricular arrhythmias.

Active ingredient of flecainide

The active ingredient of flecainide is flecainide acetate.

US brand name of flecainide and manufacturer

Flecainide is available in the US under the brand name Tambocor. It is manufactured by Meda Pharmaceuticals.

UK brand name of flecainide and manufacturer

In the UK, flecainide is available under various brand names, including Tambocor. The manufacturer may vary depending on the brand name.

Prescription requirement for flecainide

A prescription (Rx) is required for flecainide in both the US and the UK.

Availability of flecainide in the UK with NHS prescription

Flecainide is available in the UK with an NHS prescription.

Conditions treated by flecainide

Flecainide is an oral drug that’s used to prevent the following types of abnormal heart rhythms: paroxysmal supraventricular tachycardia (PSVT), paroxysmal atrial fibrillation or flutter (PAF), and ventricular arrhythmias.

How does flecainide work?

Flecainide belongs to a class of medications called antiarrhythmics. It works by stabilizing the electrical activity of the heart and restoring a normal heart rhythm. Flecainide specifically targets and blocks sodium channels in the heart cells, thereby reducing abnormal electrical signals and promoting a regular heartbeat. By restoring normal heart rhythm, flecainide effectively treats various types of arrhythmias, including atrial fibrillation and atrial flutter.

Flecainide’s effects on cardiac electrical activity result from its classification as a class IC antiarrhythmic drug. It acts specifically on sodium channels to inhibit their conductance during depolarization, thereby reducing excitability and preventing re-entry circuits that lead to arrhythmias. Consequently, flecainide aids in returning the heart’s electrical signals to their regular pattern and maintaining a stable heart rhythm.

Forms of flecainide available

Flecainide is available in the form of oral tablets.

Dosage of flecainide

The dosage of flecainide may vary depending on the individual’s specific condition, age, and response to treatment. It is important to follow the recommended dosage instructions provided by the healthcare provider.

If you miss a dose of flecainide, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

Directions for flecainide use

Flecainide should be taken exactly as directed by the healthcare provider. The tablets are usually taken orally, with or without food. It is important to swallow the tablets whole and not crush or chew them.

Warnings and precautions for flecainide

  • Flecainide may have certain risks and potential side effects. It is important to discuss these with a healthcare provider before starting the medication
  • Flecainide is contraindicated in patients with heart failure, structural heart disease or left ventricular systolic dysfunction
  • Check with your doctor right away if you develop any of the following: chest pain; shortness of breath; swelling of your hands, ankles, or feet; or weight gain. These may be symptoms of heart failure
  • Avoid coadministration of flecainide with drugs known to block potassium channels or prolong QT interval
  • Flecainide should be used with caution if you have a permanent pacemaker or temporary pacing electrodes. This drug can lower the effect of these devices on controlling your heart rhythm
  • If you have sick sinus syndrome, this medication may slow down or stop your heart from beating. Use flecainide with extreme caution if you have sick sinus syndrome
  • Regular monitoring of heart function and electrocardiograms (ECGs) may be necessary during flecainide treatment

Drug interactions

Some medications that may interact with flecainide include:

  • Combining flecainide with beta-blockers, such as metoprolol or propranolol, can increase the risk of heart rhythm disturbances
  • Concurrent use of flecainide with calcium channel blockers, such as diltiazem or verapamil, may result in an increased risk of heart-related side effects
  • Combining flecainide with amiodarone, another antiarrhythmic medication, can lead to an increased risk of irregular heart rhythms
  • Taking flecainide with digoxin, a medication used to treat heart failure and irregular heart rhythms, may increase the levels of digoxin in the blood
  • Concurrent use of flecainide with cimetidine, a medication used to reduce stomach acid, can increase the levels of flecainide in the blood, leading to potential side effects
  • Some antidepressants, such as selective serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants (TCAs), may increase the risk of serious heart rhythm disturbances when taken with flecainide
  • Taking St. John’s wort, a popular herbal supplement used for depression, with flecainide can decrease the levels of flecainide in the blood, reducing its effectiveness
  • Consuming grapefruit juice while taking flecainide can increase the levels of flecainide in the blood, leading to potential side effects
  • Combining flecainide with other antiarrhythmic medications, such as amiodarone, dofetilide, procainamide, quinidine and sotalol can increase the risk of serious heart rhythm disturbances

It is important to note that this is not an exhaustive list of medications that may interact with flecainide. Always inform your healthcare provider about all the medications, supplements, and vitamins you are currently taking before starting flecainide or any other new medication. They can provide guidance to minimise adverse effects while taking these medications together.

Use of flecainide if pregnant or planning pregnancy

The use of flecainide during pregnancy should be discussed with a healthcare provider. It should be used during pregnancy only if the potential benefits outweigh the risks.
Flecainide passes through breast milk. It may not be safe to breastfeed while using this medicine. Ask your doctor about any risks.

Possible side effects of flecainide

Here are some of the most commonly reported side effects of flecainide:

  • Some individuals may experience digestive discomfort, including nausea and vomiting, especially when starting the medication. Taking flecainide with food or dividing the dose throughout the day can help alleviate these symptoms
  • Flecainide can cause a drop in blood pressure, leading to dizziness or lightheadedness. It is important to stand up slowly from a lying or sitting position to minimize the risk of falling. If these symptoms persist or worsen, it is advisable to consult a healthcare professional
  • Feeling tired or experiencing weakness can be a common side effect of flecainide. This can be managed by getting enough rest and pacing activities throughout the day
  • While flecainide is used to regulate abnormal heart rhythms, it can sometimes cause changes in heart rhythm. This can manifest as an irregular or fast heartbeat, chest pain, or palpitations. It is important to monitor your heart rhythm closely and report any changes or concerns to your healthcare professional
  • Flecainide may also cause other less common side effects such as headache, blurred vision, constipation, or changes in taste. If you experience any new or unusual symptoms while taking flecainide, it is important to discuss them with your healthcare provider

One of the most serious potential side effects of flecainide is the risk of proarrhythmia. In some cases, flecainide can actually worsen existing irregular heart rhythms or cause new ones to develop. This can lead to life-threatening situations, including ventricular arrhythmias, which can be fatal. Therefore, it is crucial to closely monitor heart rhythm while taking flecainide, especially during the initial stages of treatment.

In rare cases, flecainide can cause more serious side effects, such as chest pain, shortness of breath, trouble breathing or swelling of the face, lips, or tongue. These symptoms may indicate an allergic reaction or a more severe underlying medical condition and require immediate medical attention.

Flecainide can also affect the electrical signals in the heart, which may lead to a condition called Torsades de Pointes. This is a type of irregular heartbeat that can be potentially dangerous. Patients at higher risk for this condition include those with certain heart conditions or individuals taking other medications that cause QT interval prolongation (a measurement of the electrical activity in the heart).

Similar drugs to flecainide

Other medications used for the treatment of irregular heart rhythms include amiodarone, propafenone, and sotalol.



Now Patient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information in this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

Stefano Mirabello Medical Reviewer
Pharmacist / B.Pharm
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