4-Drug interactions
Onions as a whole are fairly benign in terms of interacting with other drugs. However, green onions contain a large amount of Vitamin K — more than the recommended daily intake for women and almost the entire recommended daily intake for men per 1-cup serving. If you eat a lot of green onions or rapidly increase your consumption, its vitamin K content might interfere with certain blood-thinner drugs such as Coumadin. If you are currently taking blood-thinners, consult with your healthcare provider before undertaking any dietary changes.
