Forums Health Warfarin or Rivaroxaban? Reply To: Warfarin or Rivaroxaban? May 9, 2018 at 9:32 am #168 pakpak 14 Posts I was on Warsfarin for 10 yrs for AF and think I would have taken rivaroxaban like a shot if offered. Not that INRs were too onerous as my surgery in South Wales tested with a finger prick and gave instant results (my father, who is in Hampshire, still has to have blood taken for his). I was always mindful though that a bout of the trots when traveling could put levels right out the window.