QUINIDEX vs TAMBOCOR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 22, 2026·How we rate

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

quinidex tambocor

Rating

New

70/100

Pharmacy pays

~$326.26 /30

~$5.39 /30

Type

Active ingredient

QUINIDINE SULFATE

FLECAINIDE ACETATE

Manufacturer

Wyeth Pharms Inc

Alvogen

Dosage forms

Tablet, extended release

Tablet

Drug class

Antiarrhythmic

Boxed warning

None

Treats

Atrial Fibrillation, Atrial Flutter

Atrial Fibrillation, Supraventricular Tachycardia, Ventricular Tachycardia

Frequently asked questions

Which is cheaper, Quinidex or Tambocor?

Tambocor 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 Quinidex and Tambocor?

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