carbamazepine vs flecainide
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Side-by-side comparison of carbamazepine and flecainide. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Limited data in patients receiving known enzyme inducers ( phenytoin, phenobarbital, carbamazepine ) indicate only a 30% increase in the rate of flecainide elimination.
Tegretol
Tambocor
Carbamazepine is a medicine used to control seizures and treat nerve pain. It works by reducing abnormal electrical activity in the brain and calming nerve signals.
Flecainide is a medicine used to prevent irregular heartbeats. It helps your heart beat normally.
Carbamazepine is used to treat certain types of seizures, including partial seizures and generalized tonic-clonic seizures. It can also treat mixed seizure patterns. Carbamazepine also treats the pain from trigeminal neuralgia, a nerve disorder that causes intense facial pain. It is also sometimes used for glossopharyngeal neuralgia.
This medicine can prevent fast heart rates in the upper chambers of the heart. This includes supraventricular tachycardia and atrial fibrillation/flutter. Flecainide can also prevent life-threatening fast heartbeats in the lower chambers (ventricles). It is usually started in the hospital for these serious ventricular problems.
Carbamazepine is an anticonvulsant. It works by reducing the spread of seizure activity in the brain. It also stabilizes nerve impulses to reduce pain.
Flecainide works by slowing down electrical signals in the heart. This helps to stabilize your heart rhythm. It belongs to a class of drugs called Class IC antiarrhythmics.
- • Dizziness
- • Drowsiness
- • Unsteadiness
- • Nausea
- • Vomiting
- • Dizziness
- • Vision problems
- • Difficulty breathing
- • Headache
- • Nausea
- Seizure 3,609
- Drug Interaction 3,369
- Fall 3,044
- Dizziness 2,862
- Pyrexia 2,689
- Irregular heartbeat in the upper chambers 337
- Feeling tired 276
- Difficulty breathing 270
- Feeling lightheaded 255
- Feeling sick to your stomach 244
Carbamazepine can cause severe skin reactions, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), which can be fatal. If you are of Asian descent, you may need a blood test before starting this medicine. Carbamazepine can also cause serious blood problems like aplastic anemia and agranulocytosis. Contact your doctor right away if you develop a fever, sore throat, rash, or unusual bleeding or bruising.
Flecainide can increase the risk of death or cardiac arrest in some patients who have had a heart attack. It is generally not recommended for people with less serious, but unpleasant, heart rhythm problems. Flecainide is also not recommended if you have chronic atrial fibrillation.
Carbamazepine may harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if carbamazepine passes into breast milk, so talk to your doctor about breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if flecainide can harm an unborn baby. Talk to your doctor about the risks and benefits of taking flecainide while breastfeeding.
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How to Read This carbamazepine vs flecainide Comparison
carbamazepine is classified in the Anticonvulsant drug class, while flecainide sits within the Class IC Antiarrhythmic class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, carbamazepine has 15,573 submissions while flecainide has 1,382. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to carbamazepine causes the body to break down and remove flecainide faster than normal.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for carbamazepine or flecainide.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.