How does aspirin (acetylsalicylic acid) work in the body?

Long Answer: Recap: (antipyretic (decreases temperature), anti-inflammatory, analgesic) It is an irreversible Cox enzyme inhibitor (Suppression of prostaglandins that produce inflammation) Inhibits thromboxane, producing an inhibitory effect on platelet aggregation during the lifetime of the affected platelet (8–9 days). Other mechanisms also.