hello, PT/INT is prothrombin time international ratio that measures the coagulating capacity of the plasma. Conditions like warfarin doses, vitamin K deficiency, liver disease, etc raises PT INR value. It s normal value is 0.8-1.2, however with ongoing warfarin, a value of upto 2.5 is acceptable, rather maintaing high INR is our intention when on warfarin therapy. The reason for which you have been on warfarin, is what I would need to know before making further comments. hope to have satisfied your query. Regards, Dr Pankaj Borade