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What Are the Most Common Flecainide Side Effects?

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  • Written By: A. Gamm
  • Edited By: Kaci Lane Hindman
  • Last Modified Date: 13 December 2018
  • Copyright Protected:
    2003-2018
    Conjecture Corporation
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Flecainide is an antiarrhythmic agent primarily used to treat severe cardiac arrhythmias by reducing the sensitivity of the nerves in the heart, which in turn helps the heart beat more regularly. Reports indicate that there are several side effects associated with this drug. While many of them may disappear on their own over time, several are considered serious and potentially fatal. The most common, non-threatening Flecainide side effects include vision difficulties, constipation, abdominal pain, fatigue, loss of appetite and weakness. Severe side effects may include seizures, heart attack, swelling in the legs and feet, chest pains and possible death.

Common Flecainide side effects typically do not require any formal treatment as they are likely to subside over time. A variety of vision difficulties may arise including blurred vision, spots in vision and difficulty focusing. Constipation, abdominal pain, fatigue, loss of appetite and weakness are normally signs of the body getting used to the new medication. Dizziness, headache, nausea and feelings of unsteadiness are also likely to occur. If these common side effects persist or seem to worsen over time, medical attention may be required.

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Severe Flecainide side effects are common enough to warrant attention and discussion with a healthcare professional prior to starting treatment. Seizures, heart attacks, swelling of the legs and feet, and chest pains as well as rapid or irregular heartbeat may occur while taking Flecainide, which could require immediate medical attention. Slowing of the pulse and breathing may also occur, and without medical attention it is possible for breathing to completely stop. Possibility of death is low, but still a potential point of concern.

Overdose with this medication is also possible; common Flecainide side effects for overdose include nausea, vomiting and feeling faint. A reduced heart rate and seizures may also occur. Toxicity may also be severe and potentially lethal. In most cases, toxicity is only assessed through screening by a healthcare professional. As such, while using Flecainide, it is highly recommended to schedule regular check-ups with a healthcare professional to monitor the body’s overall reaction to the medication.

Drug interactions are also possible with this particular drug. It is recommended to inform a healthcare professional of any other prescription, over the counter, or herbal medications and supplements that are being taken as these medications may bring on further Flecainide side effects. Common medications that may interact with Flecainide include diuretics, beta-blockers, other heart medications and any medications for seizures.

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