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Get Potassium Chloride ER for as low as $10.79, which is 78% off the average retail price of $49.01 for the most common version, by using a GoodRx coupon.

| Dosage | Quantity | Retail price | GoodRx price |
|---|
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| 8meq | 90 tablets | $57.40 | $23.78 |
| 10meq | 90 tablets | $22.79 | $13.27 |
| 20meq | 90 tablets | $25.83 | $10.79 |
| 8meq | 90 capsules | $164.69 | $27.29 |
| 10meq | 90 capsules | $74.12 | $29.29 |

200+ medications are free, with hundreds more under $10. Just $14.99/mo. Terms apply.
GoodRx coupon prices last updated on 05/14/26.
*Prices subject to change without notice. Sales tax may apply and is not included.