clorox. they represent blood cells. and if you have afib-an irregular heartbeat that may put you at five times greater risk of stroke they can poolvel upstream to the brain, where it can block blood flow and cause a stroke. but if you have afib that's not caused by a heart valve problem, pradaxa can help stop clots from forming. pradaxa was even proven superior to warfarin at reducing the risk of stroke, in a clinical trial without the need for regular blood tests. and, in the rare event of an emergency, pradaxa is the only oral blood thinner other than warfarin with a specific reversal treatment to help your body clot normally again. pradaxa is not for people who have had a heart valve replacement. don't stop taking pradaxa without talking to your doctor. stopping increases your risk of stroke or blood clots ask your doctor if you need to stop pradaxa before any planned medical or dental procedure. pradaxa can cause serious, and sometimes, fatal bleeding. don't take pradaxa if you have abnormal bleeding. and seek immediate medical care for unexpected signs of bleeding, like unusual bruising. pradaxa may increase your bleeding ri