mexiletine vs propafenone
Side-by-side comparison of mexiletine and propafenone. 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
In another formal study (n = 8 extensive and n = 7 poor metabolizers of CYP2D6), coadministration of propafenone did not alter the kinetics of mexiletine in the poor CYP2D6 metabolizer group. In this crossover steady state study, the pharmacokinetics of propafenone were unaffected in either phenotype by the coadministration of mexiletine. Addition of mexiletine to propafenone did not lead to further electrocardiographic parameters changes of QRS, QT c , RR, and PR intervals than propafenone alone.
Recommendation: No specific dose changes are usually needed for this combination. Your doctor will monitor your heart health as they normally would.
Mexitil
Rythmol
Mexiletine is a medicine used to treat life-threatening heart rhythm problems. It helps to stabilize your heartbeat.
Propafenone (Rythmol) is a medicine that helps control irregular heartbeats. It works by slowing down electrical signals in the heart.
Mexiletine is used to treat serious, life-threatening ventricular arrhythmias, like sustained ventricular tachycardia. These are problems with the rhythm of the lower chambers of your heart. It is generally not recommended for less severe arrhythmias or asymptomatic premature ventricular contractions.
This medicine is used to help keep your heart rhythm normal if you have atrial fibrillation or supraventricular tachycardia. These are types of fast or irregular heartbeats that can cause problems. It can also treat life-threatening ventricular arrhythmias. Propafenone is for people without structural heart disease.
Mexiletine belongs to a class of drugs called antiarrhythmics. It works by slowing down the electrical signals in your heart. This helps to make your heartbeat more regular.
Propafenone works by affecting the electrical activity in your heart. It slows down the signals that cause irregular heartbeats. This helps your heart beat more regularly.
- • Nausea
- • Vomiting
- • Heartburn
- • Dizziness
- • Lightheadedness
- • Unusual taste
- • Nausea
- • Vomiting
- • Dizziness
- • Constipation
- Tiredness 31
- Fast heartbeat in the lower heart chambers 30
- Shortness of breath 26
- Feeling sick to your stomach 24
- Not sleeping well 24
- Irregular heartbeat in the upper chambers of the heart 347
- Medicine interacting with another medicine 320
- Feeling lightheaded or unsteady 261
- Harmful effect from different substances 231
- Shortness of breath 226
Mexiletine may increase the risk of death or cardiac arrest in some patients with a history of heart attack. It should only be used for life-threatening ventricular arrhythmias. This medicine can also cause liver problems, especially if you have congestive heart failure or ischemia.
This medicine may increase the risk of death in people with heart problems. Do not take this medicine if you have structural heart disease and non-life-threatening ventricular arrhythmias. Talk to your doctor about the risks and benefits of taking this medicine.
Tell your doctor if you are pregnant or plan to become pregnant. The effects of mexiletine during pregnancy are not fully known. Talk to your doctor about the risks and benefits of taking this medicine while pregnant or breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. This medicine can cross the placenta, and may affect the baby. Your doctor will monitor you and your baby for any problems.
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How to Read This mexiletine vs propafenone Comparison
mexiletine is classified in the Class IB Antiarrhythmic drug class, while propafenone 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, mexiletine has 135 submissions while propafenone has 1,385. 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 these two drugs do not appear to interfere with how the body processes either medication. they also do not cause extra changes to the heart's electrical activity when used together.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between mexiletine and propafenone - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.