I had an argument with a young nurse about coumadin being "the most dangerous drug you can be on". She was beyond reach. She said the elderly have problems with bleeding on coumadin after falls. My guess is that 98% of medical professionals have a dangerously limited understanding of warfarin, and ACT. I find that much scarier than the drug. As others have said, none of my bleedings have been life threatening. I tried to tell her about my encounter with the garage gate, how even with an INR of 6.0 I stopped bleeding in a few minutes. She couldn't hear it. She said "6.0! You should have been in the hospital getting vitamin K!" Where as my surgeon has said in the past "We want to avoid vitamin K if possible, because it will require admission for a week to re-regulate you."