Generic for diltiazem?

Diltiazem itself is the generic name.
The drug is marketed under several brand names, the most common being:

- Cardizem (short‑acting)
- Cardizem LA (extended‑release)
- Dilacor
- Diltazepam (in some countries)

So if you’re looking for the generic form, it’s simply diltiazem. If you need a brand name for prescription or pharmacy purposes, any of the ones above will refer to the same active ingredient.