While taking Coumadin, a number of factors can cause your INR levels to fluctuate outside of your safe therapeutic range at any time during the month. It is important to test your PT/INR regularly to catch these fluctuations and have your doctor properly adjust your Coumadin dosage in order to get you back within your therapeutic range.
Studies show that people who test their PT/INR weekly at home vs. monthly at a lab stay within their safe therapeutic range 35% more often. This preventative measure results in a much lower risk for stroke and internal bleeding. Keeping you safe and out of the hospital.