Skip to content
ppharmaranks
Menu

CARDIZEM SR vs NORVASC

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. CARDIZEM SR and NORVASC 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.

Rating

New
70/100

Pharmacy pays

~$9.18 /30
~$0.33 /30

Type

RX
RX

Active ingredient

DILTIAZEM HYDROCHLORIDE
AMLODIPINE BESYLATE

Manufacturer

Dosage forms

Capsule, extended release
Tablet

Drug class

Calcium Channel Blocker
Calcium Channel Blocker

Boxed warning

None
None

Half-life

about 3 to 4.5 hours
about 30 to 50 hours

Treats

Variant Angina Pectoris, Atrial Fibrillation, Atrial Flutter
Variant Angina Pectoris, Coronary Artery Disease, Hypertension

Get norvaschigher-rated option

Advertising disclosure: Some links are affiliate links. We may earn a commission at no extra cost to you. This never affects our independent ratings.

Get treatment online

Licensed online providers — consult & get prescribed if eligible.

Frequently asked questions

Which is cheaper, Cardizem SR or Norvasc?

Norvasc costs pharmacies less to acquire — about $0.33 vs $9.18 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 Cardizem SR and Norvasc?

Cardizem SR contains Diltiazem Hydrochloride, while Norvasc contains Amlodipine Besylate — 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.