How many milligrams of aspirin does an adult need to reduce fever?

An adult typically needs 325 to 650 milligrams of aspirin to reduce fever, taken every 4 to 6 hours as needed. However, it's important to follow the dosage instructions on the medication label or consult a healthcare provider for personalized guidance. Aspirin should be used with caution, especially in individuals with certain medical conditions or those taking other medications. Always consider potential side effects and contraindications before use.