What is the primary purpose of aspirin (ASA) in emergency care?

• A. Prevent clotting
• B. Antibiotic
• C. Pain relief only
• D. Increase blood pressure

Answer: (A)

In emergency care, aspirin is used for its antiplatelet effect to prevent clot formation during suspected heart attack or other acute coronary syndrome. It irreversibly inhibits COX-1 in platelets, reducing thromboxane A2 and thus decreasing platelet aggregation, which helps limit the growth of a clot and improve blood flow to the heart. While aspirin can have pain-relieving effects, its primary purpose in this setting is to prevent clot progression, not to treat infection or raise blood pressure. It’s not used as an antibiotic, and its main risk is bleeding, so it’s given only when there are no contraindications.