NCLEX Uworld Practice Test

Aspirin should be avoided in children because taking it during a viral illness can trigger Reye syndrome, a rare but life-threatening condition that combines acute brain swelling (encephalopathy) with severe liver dysfunction. This syndrome most often follows viral infections such as influenza or varicella. Early signs include persistent vomiting, confusion or unusual sleepiness, and can progress to seizures or coma as brain swelling worsens. The underlying issue is thought to involve mitochondrial dysfunction caused by salicylates in the setting of a viral infection, leading to fatty changes in the liver and impaired ammonia detoxification.

Because of this strong association, aspirin is not used for fever or pain relief in children and teens; safer alternatives like acetaminophen or ibuprofen are preferred, considering the individual’s age and health history. The other conditions listed—Guillain-Barré syndrome (an autoimmune nerve disorder), Kawasaki disease (a vasculitis in children), and rhabdomyolysis (muscle breakdown)—do not reflect the specific risk tied to aspirin use in pediatric viral illness.