Sweet clover contains courmarin (not Coumadin) after the plant has produced flowers. Many plants have blood thinning properties, even strawberries have a bit. Anyone who takes prescription medicine should always check the details if they change their diet or start to eat new plants/herbs, etc.
Here is one example of a link:
http://herbalmedicos.blogspot....
Without insurance and with little cash on hand I have been utilizing food as medicine for 2 years...knocking on wood all the while...so far it has been a success.