I have taken Warfarin for 10 yrs ..so far so good. Even after 2 hard head knocks in 10 days, no problems to date. Coaguchek home testing kit and email results..easy. The DOAC’s seem like one doesn’t ever know what their levels are. At last there is a rescue drug at major hospitals to rescue bleeding issue for DOAC’s. I found kale can bring down high Warfarin level very quickly. 100 mg of K in 1 serving. If anyone has blood slot issues..don’t eat kale!