Same thing happened to me. I have Medicare Part D, and my co-pay for Renvela was nearly $200! So I kept asking my doctor, and the dietician, and the social worker for free samples. Ask them, the manufacturers give them lots.Mine got sick of handing Renvela out, and the patient assistant plan has to be applied for by October for the next year, so they switched me to Fosrenol, who has a very generous plan for those on Part D.