Pradaxa is a blood thinner prescribed for patients with atrial fibrillation. The U.S. Food and Drug Administration (FDA) approved the drug in October 2010, and it is sold in 75 mg and 150 mg oral capsules taken twice daily. Pradaxa works by lowering the chance of blood clots forming. One side effect of Pradaxa is internal bleeding, which is very difficult to control once it starts, as there is no antidote. This uncontrollable bleeding  can sometimes be fatal. If you, or someone you know, took Pradaxa and suffered a serious bleeding event, we will be happy to discuss a potential claim with them.