How Evening Primrose interacts with Anticoagulant medications

Interaction type: Interactions

Interaction rating: Potential/Theoritical

Studies have reported that evening primrose affects the blood's clotting ability and may alter the effects of these medications and possibly the dose needed for treatment. Use with caution. (1)

These drugs include warfarin, heparin, dalteparin, tinzaparin, enoxaparin, danaparoid sodium, antithrombin III, lipirudin, argatroban, bivalirudin,


  1. View Abstract: De La Cruz JP, et al. Effect of Evening Primrose Oil on Platelet Aggregation in Rabbits Fed an Atherogenic Diet. Thromb Res. Jul1997;87(1):141-9.