Discontinuing use prior to surgery can help avoid adverse events
- Feverfew (used for migraine prevention), ginger, cranberry, St. John’s Wort and ginseng can interact with the anti-clotting drug warfarin;
- Feverfew, ginger, and gingko can interact with aspirin;
- Garlic can interfere with anti-clotting medications and the immunosuppressant drug cyclosporine (prevents transplant rejection);
- Valerian (used as a sedative) can intensify anesthetics; and
- St. John’s Wort can interact with immunosuppressive drugs and potentially lead to transplant rejection.
- Glucosamine, chondroitin and flavocoxid can affect clotting agents;
- Black cohosh can interact with the cancer drug tamoxifen; and
- Cat’s claw can interact with clotting agents, blood pressure medications and cyclosporine.