Does hemp CBD oil interfere with Coumadin?

"I have breast cancer and a clotting problem. I'm on Coumadin. "

All derivatives of cannabis can affect other drugs as they are processed through the liver. Cannabis tends to increase your INR while on Coumadin. This affect tends to be more realized when initially starting to use cannabis or stopping cannabis. We also know that eating different foods can also affect your INR, and is adjusted for with your blood level checks. Hope this helps!