administered oseltamivir phosphate “off label” by their health care providers (FDA/CDER, 2012). It was concluded that there were no safety concerns with use of this drug in children under one year of age (FDA/ CDER, 2012). This led to the subsequent studies done by the manufacturer and NIAID/NIH, which provided data on the pharmacokinetics and safety of the drug (FDA/ CDER, 2012). The FDA’s approval was based on these studies as well as extrapolated data from the older population (FDA/CDER, 2012). Legislation allows extrapolated data to be used in children when adult safety and efficacy are established (FDA, 2012).