What should we do if my grandpa falls when he's taking warfarin?

If your grandpa falls while he is taking warfarin, you should call his doctor or other emergency medical help right away. This is especially important if he has hit his head. He may be bleeding inside. Warfarin keeps his blood from clotting, so it's easy for him to bleed or bruise while he's taking this medicine. You should talk with his doctor about any injuries or bruises.