In 2000 I had a knee replacement which resulted in a nicked popiteal artery. I was put on warfarin. In. 2016 I had a repair of the bypass and was put on xeralto 20mg after having to have lovenox shots while I was in rehab ctr. In 2017 I had an angio which put a block around the clot and I remain on xeralto. I recently changed insurance which will charge me 25 percent of retail but is still $125 which I can t afford. Would it hurt to go back on warfarin or jantoven which are only around $10?