I had a stroke Sept 2011 and have done all the tests to see why..... all came back fine, no major problems at all. In the meantime I'm on clopidogrel to prevent another clot. Now my Doc recommends a thrombophilia test to see if my problem lies there. However, does anyone know if I have to stop the Clopidogrel for a while before I can do the test? I'm a bit reluctant to stop it at all since it's good "insurance" at the moment to prevent a repeat stroke.