16 May 2019 INR is the ratio of the patient's prothrombin time to a standard prothrombin time. It reflects the time it takes for the blood to clot against an average time. Is the index used to monitor patients taking oral anticoagulants, such as: Vitamin K antagonists - warfarin (e.g. Varfine®); Acenocoumarol (e.g. Sintrom®). The higher the INR , the longer it takes the blood to clot. This means that INR varies directly with the dose of anticoagulant: Increasing the daily dose of medication increases INR; Decreasing the daily dose of medication decreases INR. INR value enables physicians to indicate the appropriate dose for each patient and see if the medication needs to be adjusted. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.
