I have been using Tymlos since 9/2022. I did not have any co-pay. Radius Labs paid my copay. I was told that that monthly copay was #350.00 However, 1/2024, my meds were subjected to Medicare Part D and I have a monthly copay of $150.00. I was able to switch back to my old insurance for meds and keeping my fingers crossed where Radius Lab would cover my copay next month and beyond.