In adult chest pain protocol, what is the aspirin dose?

• A. 324 mg (81 mg x 4) PO
• B. 81 mg PO
• C. 650 mg PO
• D. 160 mg PO

Answer: (A)

This tests the dose of aspirin used in an adult chest pain protocol to achieve rapid antiplatelet effects. The standard amount is 324 mg total, typically four 81 mg tablets chewed and swallowed. Chewing speeds absorption so platelet inhibition begins sooner, which is crucial in suspected acute coronary syndrome. A smaller 81 mg dose is often used for daily prevention but is not sufficient in the acute setting. Higher analgesic doses like 650 mg or 160 mg aren’t the recommended protocol amounts for this purpose and don’t provide the same immediate antiplatelet benefit. So 324 mg is the appropriate choice to balance quick onset with safety in this context.