work unless medical intervention taken warfarin ingestion if memory serves takes several day to kill due to slow metabolic rate and due to main action minutiae in a similar way as old generation rat poisons do, heparin far more potent with instant anticoagulative action and is used by ambulance worker in case of life threatening blood clotting so it's should be more reliable but i doubt you can get hands on it unless your condition is serious(it's used in an injectable form, again if memory serves). so i think it would work w/ cutting(down the road, not across the street) but both methods are on bottom regarding to reliability blood thinners would just prevent blood clotting(the main cause of fail in cutting method) and that's all