Which of the following is an example of an anticoagulant?

Xarelto is an anticoagulant that works by inhibiting a specific clotting factor, Factor Xa, which plays a crucial role in the coagulation cascade. By inhibiting this factor, Xarelto helps to prevent the formation of blood clots, making it an effective option for the management of conditions such as atrial fibrillation, deep vein thrombosis (DVT), and pulmonary embolism (PE).

In contrast, ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used primarily for pain and inflammation relief, rather than for anticoagulation. Omeprazole is a proton pump inhibitor that reduces stomach acid and is used for gastric issues, while loperamide is an anti-diarrheal medication that slows gut movement. None of these alternatives serve the purpose of anticoagulation, which is specifically aimed at preventing clot formation in the bloodstream.