@genlty hmmmm that study on bisphosphonates and afib was January 2022. I was hoping it was older and outdated! My endo told me that that risk had been disproven so now I have to talk with him. So far I have had two 1mg doses of Reclast (20% dose) and I am going to talk to him about the third, especially since Ben Leder MD says a half dose may be enough. That said, in my case, more fractures could be life-threatening and I seem to be able to deal with afib when it happens by going to the ER. I haven't had any since I went on Reclast and had two whole years without afib while on Tymlos despite the fact that it sped up the heart briefly.