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| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 120mg | 30 capsules | N/A | $9.98 |
| 180mg | 90 capsules | $46.10 | $21.35 |
| 240mg | 90 capsules | $102.18 | $34.67 |
| 300mg | 90 capsules | $134.08 | $44.88 |
| 360mg | 90 capsules | $268.74 | $31.84 |

Get Diltiazem ER (Cardizem CD) for as low as $21.83, which is 77% off the average retail price of $94.74 for the most common version, by using a GoodRx coupon.
Get an extra $10.00 off Diltiazem ER (Cardizem CD) and up to 90% off all prescriptions. Gold plans start at just $9.99/mo. Cancel any time.*
GoodRx coupon prices last updated on 04/10/26.
*Prices subject to change without notice. Sales tax may apply and is not included.