Which of the following is an example of a Direct Acting Oral Anticoagulant (DOAC)?

Eliquis is an example of a Direct Acting Oral Anticoagulant (DOAC) because it works by directly inhibiting Factor Xa, an essential component in the coagulation cascade that is responsible for blood clot formation. DOACs, including Eliquis (apixaban), represent a newer class of anticoagulants that offer advantages such as more predictable pharmacokinetics, fewer dietary restrictions, and no need for routine INR monitoring compared to traditional anticoagulants.

In contrast, other medications listed do not fit the definition of a DOAC. Aspirin and Plavix (clopidogrel) are antiplatelet agents, which prevent platelet aggregation rather than acting directly on clotting factors. Warfarin is a vitamin K antagonist that requires monitoring of INR levels to manage dosing and does not have the direct action associated with DOACs. Therefore, Eliquis stands out as the correct choice among the options provided.