Polyunsaturated fat came upon in designated oils can even work together with anticoagulants like warfarin
http://travislvnu940.wpsuo.com/from-grapefruit-to-garlic-surprising-foods-that-influence-drug-efficacy-1
Polyunsaturated fat found in certain oils would have interaction with anticoagulants like warfarin, affecting blood thinning properties