Hi - well I've finally taken my last rivaroxaban tablet on Thursday and am now on warfarin. Most side effects are wearing off and i was feeling much better. I say was because i am now experiencing an allergic reaction. On riveroxaban and the other NOACs which I've taken over the last 7 weeks i had a definite allergic response - itching head and prickly lips. On Thursday whilst i was taking both warfarin and riveroxaban i had a definite allergic reaction a few hours after taking warfarin and now, all day Sunday it's driving me mad. I'll go to the gp tomorrow but does anyone know if a reaction to riveroxaban could get worse having stopped it? If I'm allergic to warfarin I don't know what to do next.