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%.Find expert answers to your health questions so you can make the best decisions for yourself and your family.Health conditions
Medications & treatment
Access & affordability
Medication discounts
Get Effer-K for as low as $17.06, which is 69% off the average retail price of $54.77 for the most common version, by using a GoodRx coupon.
You can save more on select medications with GoodRx Companion. See which medications are eligible.
Check your prescription
Pricing is calculated based on your prescription details.
250+ medications are free, with hundreds more under $10. Plans start at $9.99/mo. (when paid yearly). Terms apply.
GoodRx coupon prices last updated on 10/22/26.
Popular offers
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| 10meq | 30 effervescent tablets | N/A | $20.91 |
| 20meq | 30 effervescent tablets | $36.54 | $21.57 |
| 25meq | 30 effervescent tablets | N/A | $21.05 |
