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Flecainide Side Effects

Common Flecainide Side Effects

The most commonly reported Flecainide side effects (click to view or check a box to report):

Electrocardiogram Qrs Complex Prolonged (37)
Toxicity To Various Agents (32)
Atrial Fibrillation (32)
Syncope (29)
Hypotension (29)
Dyspnoea (29)
Bradycardia (28)
Ventricular Tachycardia (27)
Cardiac Arrest (26)
Dizziness (24)
Asthenia (23)
Atrial Flutter (23)
Electrocardiogram Qt Prolonged (23)
Intentional Overdose (23)
Loss Of Consciousness (22)
Torsade De Pointes (21)
Tachycardia (21)
Overdose (20)
Electrocardiogram Abnormal (18)
Nausea (18)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

Flecainide Side Effects Reported to FDA

The following Flecainide reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.


The appearance of Flecainide on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has found a causal relationship between the drug and the listed risk.
Ventricular Tachycardia, Overdose
on Mar 28, 2014 Female from FR , 72 years of age, was diagnosed with and was treated with Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: ventricular tachycardia, overdose. Flecainide dosage: 100 Mg, Bid.
Associated medications used:
  • Haloperidol (1 Mg, Bid)
  • Irbesartan (300 Mg, Daily)
Patient was hospitalized.

Atrioventricular Block First Degree, Hypotension, Sopor
Patient was taking Flecainide Acetate. Patient felt the following Flecainide side effects: atrioventricular block first degree, hypotension, sopor on Mar 12, 2014 from IT Additional patient health information: Female , 34 years of age, was diagnosed with and. Flecainide Acetate dosage: 300 Milligram Daily;.
Multiple prescriptions taken:
  • Mirtazapine (900 Milligram Daily;)
  • Buscofen
  • Sotalol Hydrochloride
  • Sertraline Hydrochloride
  • Bromazepam
Patient was hospitalized.

Left Ventricular Failure, Left Ventricular Hypertrophy, Systolic Dysfunction, Dyspnoea, Ejection Fraction Decreased, Ventricular Tachycardia, Overdose
Adverse event was reported on Feb 27, 2014 by a Female taking Flecainide (Dosage: 100 Mg, Bid) . Location: FR , 72 years of age, After Flecainide was administered, patient encountered several Flecainide side effects: left ventricular failure, left ventricular hypertrophy, systolic dysfunction, dyspnoea, ejection fraction decreased, ventricular tachycardia, overdose.
Multiple concurrent drugs taken:
  • Irbesartan
  • Haloperidol
  • Amiodarone
Patient was hospitalized.

Poisoning, Completed Suicide, Exposure Via Ingestion
on Feb 10, 2014 Male from US , 31 years of age, was treated with Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: poisoning, completed suicide, exposure via ingestion. Flecainide dosage: N/A.
Associated medications used:
  • Quetiapine
  • Citalopram (P.o.)
  • Oxycodone
  • Alprazolam



Product Quality Issue
on Feb 12, 2014 Male from US , 54 years of age, was diagnosed with and was treated with Flecainide. Patient felt the following Flecainide side effects: product quality issue. Flecainide dosage: 300 Mg.

Poisoning, Exposure Via Ingestion
Patient was taking Flecainide. After Flecainide was administered, patient encountered several Flecainide side effects: poisoning, exposure via ingestion on Feb 07, 2014 from US Additional patient health information: Female , 75 years of age, . Flecainide dosage: Oral.

Poisoning, Exposure Via Ingestion, Completed Suicide
Adverse event was reported on Feb 07, 2014 by a Male taking Flecainide (Dosage: Oral) . Location: US , 38 years of age, Directly after, patient experienced the unwanted or unexpected Flecainide side effects: poisoning, exposure via ingestion, completed suicide.
Associated medications used:
  • Ethanol (ethanol) (ethanol) (Oral)


Poisoning, Exposure Via Ingestion
on Feb 07, 2014 Male from US , 51 years of age, was treated with Flecainide. Patient felt the following Flecainide side effects: poisoning, exposure via ingestion. Flecainide dosage: N/A.

Completed Suicide
on Feb 07, 2014 Male from US , 40 years of age, was treated with Flecainide. After Flecainide was administered, patient encountered several Flecainide side effects: completed suicide. Flecainide dosage: N/A.
Multiple concurrent drugs taken:
  • Simvastatin (simvastatin) (simvastatin)
  • Sotalol (sotalol)
  • Warfarin (warfarin) (warfarin)


Rash, Urticaria, Product Quality Issue
Patient was taking Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: rash, urticaria, product quality issue on Feb 19, 2014 from US Additional patient health information: Female , 71 years of age, weighting 205.0 lb, was diagnosed with and. Flecainide dosage: 300 Mg.

Dizziness, Palpitations, Bradycardia, Hypotension, Atrioventricular Block, Toxicity To Various Agents, Overdose, Syncope
Adverse event was reported on Dec 09, 2013 by a Female taking Flecainide (Dosage: 400 Mg) . Location: US , 82 years of age, Patient felt the following Flecainide side effects: dizziness, palpitations, bradycardia, hypotension, atrioventricular block, toxicity to various agents, overdose, syncope.
Multiple prescriptions taken:
  • Verapamil (verapamil) (verapamil)
  • Warfarin (warfarin) (warfarin)
  • Albuterol Inhaler (salbutamol) (inhalant) (salbutamol)
  • Budesonide And Formoterol Combination Inhaler (formoteroal W/budesonide) (budesonide, Formoterol)
Patient was hospitalized.

Toxicity To Various Agents
on Nov 18, 2013 Male from COUNTRY NOT SPECIFIED , child 3 years of age, was diagnosed with and was treated with Flecainide. After Flecainide was administered, patient encountered several Flecainide side effects: toxicity to various agents. Flecainide dosage: N/A. Patient was hospitalized.

Organising Pneumonia
on Nov 14, 2013 Male from DE , 68 years of age, weighting 187.4 lb, was diagnosed with and was treated with Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: organising pneumonia. Flecainide dosage: 50 Mg, Bid.
Associated medications used:
  • Marcumar
  • Metoprolol
  • Tamsulosin (0.4 Mg, Qd)
Patient was hospitalized.

Mania, Violence-related Symptom
Patient was taking Flecainide. Patient felt the following Flecainide side effects: mania, violence-related symptom on Jan 02, 2014 from US Additional patient health information: Male , 53 years of age, weighting 163.1 lb, was diagnosed with and. Flecainide dosage: 200 Mg. Patient was hospitalized.

Bradycardia, Hypotension, Hypoglycaemia
Adverse event was reported on Nov 11, 2013 by a Female taking Flecainide Teva 100mg (Dosage: 150 Milligram Daily;) was diagnosed with and. Location: IT , 76 years of age, After Flecainide was administered, patient encountered several Flecainide side effects: bradycardia, hypotension, hypoglycaemia.
Multiple concurrent drugs taken:
  • Amaryl 2mg (2 Milligram Daily;)
  • Blopresid 32mg/25mg (1 Dosage Forms Daily;)
  • Cardura 4mg (4 Milligram Daily; Modified Release Tablet)
  • Lansox 15mg (1 Dosage Forms Daily; Orodispersible Tablet)
  • Coumadin
Patient was hospitalized.

Syncope, Tachyarrhythmia, Ventricular Tachycardia, Toxicity To Various Agents, Overdose
on Nov 07, 2013 Male from US , child 3 years of age, was diagnosed with and was treated with Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: syncope, tachyarrhythmia, ventricular tachycardia, toxicity to various agents, overdose. Flecainide dosage: N/A. Patient was hospitalized.

Toxicity To Various Agents
on Nov 07, 2013 Male from US , child 3 years of age, was diagnosed with and was treated with Flecainide Acetate. Patient felt the following Flecainide side effects: toxicity to various agents. Flecainide Acetate dosage: Unk.

Tachycardia, Cardiac Arrest, Incorrect Dose Administered
Patient was taking Flecainide Acetate. After Flecainide was administered, patient encountered several Flecainide side effects: tachycardia, cardiac arrest, incorrect dose administered on Oct 11, 2013 from US Additional patient health information: Male , weighting 8.82 lb, was diagnosed with and. Flecainide Acetate dosage: Every 8 Hours.

Chest Pain, Product Quality Issue
Adverse event was reported on Oct 09, 2013 by a Female taking Flecainide (Dosage: 200 Mg) was diagnosed with and. Location: US , 51 years of age, Directly after, patient experienced the unwanted or unexpected Flecainide side effects: chest pain, product quality issue.
Associated medications used:
  • Digoxin


Atrioventricular Block First Degree, Electrocardiogram Qt Prolonged, Blood Potassium Decreased
on Oct 03, 2013 Male from US , 51 years of age, was treated with Flecainide. Patient felt the following Flecainide side effects: atrioventricular block first degree, electrocardiogram qt prolonged, blood potassium decreased. Flecainide dosage: N/A.
Multiple prescriptions taken:
  • Alprozolam (alprazolam) (alprazolam)
  • Lisinopril (lisinopril) (lisinopril)
  • Aspirin (acetylysalicylic Acid) (acetylsalicylic Acid)
Patient was hospitalized.

Accidental Overdose, Toxicity To Various Agents
on Sep 09, 2013 Male from COUNTRY NOT SPECIFIED , weighting 8.82 lb, was diagnosed with and was treated with Flecainide. After Flecainide was administered, patient encountered several Flecainide side effects: accidental overdose, toxicity to various agents. Flecainide dosage: N/A.

Lethargy, Cardiac Arrest Neonatal, Tachycardia, Toxicity To Various Agents, Accidental Overdose, Product Label Issue
Patient was taking Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: lethargy, cardiac arrest neonatal, tachycardia, toxicity to various agents, accidental overdose, product label issue on Aug 30, 2013 from US Additional patient health information: Male , weighting 8.82 lb, was diagnosed with and. Flecainide dosage: N/A.
Associated medications used:
  • Atropine
  • Adenosine
  • Esmolol
Patient was hospitalized.

Neutropenia, Transient Ischaemic Attack, White Blood Cell Count Decreased
Adverse event was reported on Aug 27, 2013 by a Female taking Flecainide (Dosage: N/A) was diagnosed with and. Location: AU , 73 years of age, Patient felt the following Flecainide side effects: neutropenia, transient ischaemic attack, white blood cell count decreased.
Multiple prescriptions taken:
  • Omeprazole
  • Metoprolol
Patient was hospitalized.

Supraventricular Tachycardia, Malaise, Apnoea, Hypotonia, Agitation, Confusional State, Posture Abnormal, Electrocardiogram Qrs Complex Prolonged
on Aug 27, 2013 Male from GB , child 8 years of age, was diagnosed with and was treated with Flecainide. After Flecainide was administered, patient encountered several Flecainide side effects: supraventricular tachycardia, malaise, apnoea, hypotonia, agitation, confusional state, posture abnormal, electrocardiogram qrs complex prolonged. Flecainide dosage: N/A.

Accidental Overdose, Cardiac Arrest Neonatal, Tachycardia, Toxicity To Various Agents, Product Label Issue
on Aug 29, 2013 Male from US , weighting 8.82 lb, was diagnosed with and was treated with Flecainide. Directly after, patient experienced the unwanted or unexpected Flecainide side effects: accidental overdose, cardiac arrest neonatal, tachycardia, toxicity to various agents, product label issue. Flecainide dosage: 8mg Every 8h (instead Of Prescribed Dosage).
Associated medications used:
  • Atropine (0.1mg)
  • Adenosine
  • Esmolol
Patient was hospitalized.

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Keep Track of Side Effects

Note Your Observations

It is really important to keep of your symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:

     

    Side Effects

    Scale

    Date & Time

    Other Medicine(s) or Treatment(s)

     

     

     

     

    Scale: 1 = very mild to 10 = very bad


    Track Online

  • User Sign In
  • Register to track your side effects

  • You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

    Discuss Flecainide Side Effects



    Did You Have a Flecainide Side Effect?

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    How Effective is Flecainide for You?

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    Safety Alerts, Active Ingredients, Usage Information

    Alternative FLECAINIDE Names:FLECAINID

    Active Ingredient: FLECAINID

    More About Flecainide

    Side Effects reported to FDA: 443

    Flecainide safety alerts: No

    Reported deaths: 42

    Reported hospitalizations: 195

    Latest Flecainide clinical trials