IBUTILIDE FUMARATE vs RYTHMOL SR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 18, 2026·How we rate

Possible drug interaction. IBUTILIDE FUMARATE and RYTHMOL SR are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	IBUTILIDE FUMARATE	RYTHMOL SR
Rating	70/100	70/100
Pharmacy pays	—	~$10.51 /30
Type	RX	RX
Active ingredient	IBUTILIDE FUMARATE	PROPAFENONE HYDROCHLORIDE
Manufacturer	Luitpold	Glaxosmithkline
Dosage forms	Injectable	Capsule, extended release
Drug class	Antiarrhythmic	Antiarrhythmic
Boxed warning	None	None
Half-life	—	about 2 to 10 hours (immediate-release) in the ~90% of adults who are extensive CYP2D6 metabolizers
Treats	Atrial Fibrillation, Atrial Flutter	Atrial Fibrillation, Supraventricular Tachycardia

ibutilide fumarate rythmol sr

Rating

70/100

Pharmacy pays

—

~$10.51 /30

Type

Active ingredient

IBUTILIDE FUMARATE

PROPAFENONE HYDROCHLORIDE

Manufacturer

Luitpold

Glaxosmithkline

Dosage forms

Injectable

Capsule, extended release

Drug class

Antiarrhythmic

Boxed warning

None

Half-life

—

about 2 to 10 hours (immediate-release) in the ~90% of adults who are extensive CYP2D6 metabolizers

Treats

Atrial Fibrillation, Atrial Flutter

Atrial Fibrillation, Supraventricular Tachycardia

Frequently asked questions

Which is better-rated, Ibutilide Fumarate or Rythmol SR?

Ibutilide Fumarate and Rythmol SR are tied at 3.5 out of 5 by our independent rating.

What is the difference between Ibutilide Fumarate and Rythmol SR?

Ibutilide Fumarate contains Ibutilide Fumarate, while Rythmol SR contains Propafenone Hydrochloride — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.