Ah someone after my own heart. How do you know if its working too well also? I got in a debate with my cardiologist over it. She told me truthfully she uses it because allot of people just refuse to do the testing needed for older anticoagulants.
It can be measured by an anti-Xa assay using the appropriate calibrator. Most doctors either don't know about the test or how to order it or do not want the patient to have to pay the cost since it is an expensive test.
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