My Husband has been on rivaroxabin for the last 18 months because he had so much trouble trying to give blood from veins and ended up with black and blue arms.His cardiologist then took him off warfarin and on to rivaroxiban which now means a very occasional blood test. There is a risk of bleeding badly as here is no antidote but coming off the tablet only takes a day to have blood back to normal for any operations to take place and back on the tablets the following day. So yes he is very happy with the outcome.