# Can Cardizem CD (diltiazem extended-release) be crushed?

Canonical: [https://followyourswallow.com/medications/can-i-crush-diltiazem-extended-release](https://followyourswallow.com/medications/can-i-crush-diltiazem-extended-release)

## Direct answer

**NO. Do not crush.** Cardizem CD, Cardizem LA, and other extended-release diltiazem products are on the ISMP “Do Not Crush” list; crushing releases a day's worth of drug at once instead of gradually.

Formulation: Extended-release capsule or tablet

## What to ask the pharmacist

Ask the pharmacist whether an immediate-release diltiazem tablet regimen or an ER capsule brand whose label allows opening and sprinkling the beads is an option.

## Verification

- Source type: ISMP Do Not Crush guidance
- Source note: ISMP “Do Not Crush” list (extended-release)
- Source checked: 2026-06-10


## Safety

Confirm with your pharmacist before changing how any medication is taken. Match the exact drug, strength, dosage form, release mechanism, manufacturer or NDC, and imprint. A pill image alone is not enough.