Why is aspirin contraindicated in children who have a viral illness?

• A. Increased risk of dehydration
• B. Risk of Reye's syndrome
• C. Interferes with vaccines
• D. Causes liver failure

Answer: (B)

Aspirin use in children with a viral illness is avoided because it can trigger Reye's syndrome, a rare but potentially life-threatening condition that causes swelling of the brain and failure of the liver. This risk becomes most notable during or after viral infections such as influenza or chickenpox. The exact mechanism isn’t fully understood, but salicylates appear to disrupt liver cell metabolism in the setting of a viral illness, leading to brain swelling, vomiting, confusion, and other serious symptoms. Because of this, safer options like acetaminophen or ibuprofen are used to reduce fever or pain in children, with dosing based on age and weight. The other choices don’t describe the key danger here—the link between aspirin and Reye's syndrome during viral illness.