Estimate and compare the likely monthly and annual out-of-pocket cost range for the three main potassium-binder medications discussed in our Lokelma vs Kayexalate guide. This is a planning estimate only, built from typical U.S. retail price ranges — your actual cost depends entirely on your insurance plan, pharmacy, and dose.
How this estimate is built: price ranges reflect typical U.S. retail pricing ranges reported in our sourced comparison article, not a live pharmacy quote. Actual cost varies by pharmacy, dose, insurance formulary tier, and manufacturer coupons/assistance programs. This tool does not account for your specific insurance plan — call your pharmacy or insurer for an exact price. This is not a recommendation to choose one medication over another; that decision belongs to you and your prescriber based on your clinical situation. See our medical disclaimer.
Why potassium binder costs vary so much
Lokelma, Patiromer, and Kayexalate treat the same underlying problem — hyperkalemia, or high blood potassium — but they differ enormously in price because of when they were developed and approved. Kayexalate dates to 1958 and has long since gone generic, while Lokelma and Patiromer are newer, patent-protected agents, which is the main driver of the cost gap this calculator shows. Insurance formulary tier, pharmacy choice, and manufacturer savings programs can all shift your actual out-of-pocket cost significantly from these general estimates.
Related reading
Frequently asked questions
Why is Lokelma so much more expensive than Kayexalate?
Kayexalate has been generic and widely available since shortly after its 1958 approval, while Lokelma is a newer, brand-name/patent-protected medication with a more modern (and more expensive) manufacturing process. Price typically comes down once a drug loses patent protection and generic competition begins.
Does insurance usually cover Lokelma or Patiromer?
Coverage varies significantly by plan and often requires prior authorization, since these are newer, higher-cost medications. Your pharmacy or insurer can tell you your specific formulary tier and any prior-authorization requirements before you start treatment.
Are there patient assistance programs for these medications?
Manufacturers of newer brand-name potassium binders often offer savings cards or patient assistance programs for eligible patients. Ask your prescriber or pharmacist, or check the manufacturer’s website directly, since program terms and eligibility change over time.