I am taking 2 regular aspirin a day for blood thinning. I have been on warfarin in the past for blood clots in legs and lung. I have been leery of trying stronger pain meds. I am in a test study now with a new grafting material made from placental tissue. It has worked somewhat, but it is a slow process. I talked to my regular Dr. about Xarelto, but she seemed to think I was ok with aspirin as a blood thinner. I also have factor V Leiden, which aggravates the blood clotting. Sheila