Can aspirin and warfarin be taken together?

Aspirin and warfarin are generally not recommended for concurrent use. **Efficacy and Risks:** Aspirin is an antiplatelet agent that inhibits platelet aggregation, whereas warfarin is an oral anticoagulant. Both drugs are primarily used for the prevention and treatment of thromboembolic disorders. However, their principal adverse effect is bleeding; co-administration may significantly increase the risk of bleeding—potentially leading to hemorrhagic shock or even life-threatening complications. **Drug Metabolism:** Both agents are metabolized via the liver and kidneys. Concurrent use may impose additional metabolic burden on these organs, potentially resulting in hepatic or renal dysfunction. **Special Circumstances:** In certain specific clinical scenarios—such as atrial fibrillation or high-risk thromboembolism (e.g., high CHA₂DS₂-VASc score)—short-term combination therapy may be considered. Nevertheless, such use must be strictly guided by a physician and accompanied by close monitoring of coagulation parameters.