Xarelto the number one prescribed novel oral anticoagulant in the US is facing serious allegations after the drug was found responsible for causing stroke and internal bleeding. Xarelto is known as the newest craze of anticoagulant medications used in the treatment of atrial fibrillation, and deep vein thrombosis. Xarelto works by helping to thin the blood and increase the blood flow through out the entire body. Bayer chose to market Xarelto as the first of its kind not to require blood test monitoring. Opting not to require blood test monitoring turned out to be greatly detrimental and in some cases fatal. Its no wonder the amount of lawsuits filed has grown from 100 in 2013 to over 5,000 in 2016.