Despite aspirin’s widespread use during the flu epidemics of earlier eras, it is now recommended that you consult your doctor before using aspirin, since scientists have uncovered a connection to Reye syndrome, a condition that causes brain and liver damage, when aspirin is delivered to those 19 or younger. Public health notices from the American Pharmacological Association stressed the importance of correctly using aspirin after the connection became apparent. The Food and Drug Administration (FDA) led a similar campaign called “Rx for Flu or Chicken Pox: Kindness.”