Why does applying an ice pack to the forehead of a person with a fever reduce body temperature less effectively than taking an antipyretic medication like ibuprofen?

💡 Explanation

Ibuprofen inhibits prostaglandin synthesis, decreasing the hypothalamic set-point for body temperature; because the hypothalamus regulates temperature, this reduction prompts heat dissipation mechanisms. Ice packs cool the skin, but this peripheral cooling is a weaker stimulus than resetting the hypothalamic thermostat, therefore, ibuprofen more effectively reduces fever, rather than just surface temperature.

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