Our Members Asked:
I take warfarin (Coumadin), an anticoagulant drug. Are there supplements I should avoid, or be taking, due to this drug?
Yes, the effectiveness of warfarin (Coumadin), anisindione (Miradon) and other anticoagulant drugs prescribed to help prevent blood clots can be impacted by taking supplements. Because it can be affected by a large number of herbs, supplements and foods, it's important to consult your physician before taking any supplement with warfarin.
Below are some examples of supplements that may potentially interact with warfarin (more details can be found by clicking on the links):
Supplements that may increase warfarin's blood-thinning effect (and consequently, the risk of abnormal bleeding) include:
- CBD (cannabidiol)
- Digestive enzymes (i.e. papain and bromelain)
- Fish oil
- Grapefruit juice
- Milk thistle
Supplements that may reduce warfarin's ability to thin the blood include: