CARDIZEM vs CARDIZEM SR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Attribute	CARDIZEM	CARDIZEM SR
Rating	New	New
Pharmacy pays	~$9.18 /30	~$9.18 /30
Type	RX	RX
Active ingredient	DILTIAZEM HYDROCHLORIDE	DILTIAZEM HYDROCHLORIDE
Manufacturer	Biovail	Biovail
Dosage forms	Tablet	Capsule, extended release
Drug class	Calcium Channel Blocker	Calcium Channel Blocker
Boxed warning	None	None
Half-life	about 3 to 4.5 hours	about 3 to 4.5 hours
Treats	Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter	Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter

cardizem cardizem sr

Rating

New

Pharmacy pays

~$9.18 /30

Type

Active ingredient

DILTIAZEM HYDROCHLORIDE

Manufacturer

Biovail

Dosage forms

Tablet

Capsule, extended release

Drug class

Calcium Channel Blocker

Boxed warning

None

Half-life

about 3 to 4.5 hours

Treats

Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter

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Frequently asked questions

Which is cheaper, Cardizem or Cardizem SR?

Pharmacies pay about the same to acquire either one — roughly $9.18 for a 30-count supply, per the CMS NADAC survey. That is not what you will be charged: your price is set by your insurer and the pharmacy, not by what the drug cost them.

What is the difference between Cardizem and Cardizem SR?

Both Cardizem and Cardizem SR share the active ingredient Diltiazem Hydrochloride.

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.