Find expert answers to your health questions so you can make the best decisions for yourself and your family.Prescription savings
Stop paying too much for your prescriptions. Compare prices, get pharmacy coupons, and save up to 80%.Resources
About GoodRx
Find expert answers to your health questions so you can make the best decisions for yourself and your family.Health conditions
Medications & treatment
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Medication discounts
200+ medications are free, with hundreds more under $10. Just $14.99/mo. Terms apply.
GoodRx coupon prices last updated on 06/24/26.
*Prices subject to change without notice. Sales tax may apply and is not included.
Get Effer-K for as low as $18.60, which is 43% off the average retail price of $32.81 for the most common version, by using a GoodRx coupon.
| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 10meq | 30 effervescent tablets | N/A | $20.91 |
| 20meq | 30 effervescent tablets | $33.18 | $23.20 |
| 25meq | 30 effervescent tablets | $74.70 | $18.15 |
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