Aspirin

Antiplatelet (COX Inhibitor)

Drug Class: Antiplatelet (COX Inhibitor)
Mechanism of Action (MOA): Irreversibly acetylates COX-1 → ↓ thromboxane A2 → impaired platelet aggregation for the platelet's life (~7–10 days).
Clinical Notes: ACS and secondary prevention. GI bleeding; Reye syndrome in children with viral illness; tinnitus in salicylate overdose. The 'A' in MONA.
Source: FDA label (DailyMed)