See the DrugPatentWatch profile for Diltiazem
Are Cardizem and diltiazem ER the same drug?
Cardizem is a brand name for diltiazem. “ER” usually means extended-release diltiazem, which is the same active ingredient and general drug type as many generic “diltiazem ER” products. Because they match on active ingredient, dose strength, and release type, they’re commonly treated as interchangeable for pricing and pharmacy coverage purposes.
What does “Cardizem vs diltiazem ER” mean for price?
The price difference usually comes from:
- Brand vs generic status (Cardizem is the brand; diltiazem ER is often generic).
- Dose strength (prices vary by mg amount).
- Supply and pharmacy pricing (cash price vs insurance copay).
- Formulation specifics (extended-release version vs another diltiazem ER product, or different NDC products).
In most cases, generic diltiazem ER is cheaper than Cardizem.
Why can prices still differ even if both are “diltiazem ER”?
Even with the same “ER” label, differences in the exact product can affect price, including:
- The specific extended-release version (each has its own NDC/product listing).
- Tablet vs capsule packaging.
- Insurance formulary tier (generic preferred vs non-preferred).
- Whether the pharmacy bills under a different NDC than you expect.
How to check the real price at your pharmacy
To get the actual price comparison, ask your pharmacy for the cash/insurance price for both:
- Cardizem ER (include the exact strength, like 120 mg, 180 mg, etc.)
- Diltiazem ER (include the exact strength and whether it’s for a specific manufacturer or NDC)
If you tell me your dose strength (mg), tablet/capsule, and your country (US/other), I can help you phrase what to ask for and how to compare apples-to-apples.