Which of the following is considered a common anticoagulant?

Aspirin is classified as a common anticoagulant because it has the ability to inhibit platelet aggregation, which helps to prevent blood clots from forming. This antiplatelet effect is particularly beneficial in cardiovascular disease management, as it reduces the risk of heart attacks and strokes by improving blood flow and maintaining vascular health.

In contrast, the other choices listed—ibuprofen, naproxen, and acetaminophen—do not primarily serve as anticoagulants. Ibuprofen and naproxen are nonsteroidal anti-inflammatory drugs (NSAIDs) that primarily alleviate pain and inflammation, while acetaminophen is primarily used as an analgesic and antipyretic. Although NSAIDs can have some impact on platelet function, they do not carry the same anticoagulant properties that aspirin does, nor are they prescribed specifically to prevent blood clots.