FLECAINIDE ACETATE vs QUINIDINE SULFATE

Independent side-by-side comparison.

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

Possible drug interaction. FLECAINIDE ACETATE and QUINIDINE SULFATE 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	FLECAINIDE ACETATE	QUINIDINE SULFATE
Rating	70/100	New
Pharmacy pays	~$5.39 /30	~$326.26 /30
Type	RX	RX
Active ingredient	FLECAINIDE ACETATE	QUINIDINE SULFATE
Manufacturer	Ani Pharms	Halsey
Dosage forms	Tablet	Tablet
Drug class	Antiarrhythmic	Antiarrhythmic
Boxed warning	None	None
Treats	Atrial Fibrillation, Supraventricular Tachycardia, Ventricular Tachycardia	Atrial Fibrillation, Atrial Flutter

flecainide acetate quinidine sulfate

Rating

70/100

New

Pharmacy pays

~$5.39 /30

~$326.26 /30

Type

Active ingredient

FLECAINIDE ACETATE

QUINIDINE SULFATE

Manufacturer

Ani Pharms

Halsey

Dosage forms

Tablet

Drug class

Antiarrhythmic

Boxed warning

None

Treats

Atrial Fibrillation, Supraventricular Tachycardia, Ventricular Tachycardia

Atrial Fibrillation, Atrial Flutter

Frequently asked questions

Which is cheaper, Flecainide Acetate or Quinidine Sulfate?

Flecainide Acetate costs pharmacies less to acquire — about $5.39 vs $326.26 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Flecainide Acetate and Quinidine Sulfate?

Flecainide Acetate contains Flecainide Acetate, while Quinidine Sulfate contains Quinidine Sulfate — 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.