Sebelius, however, said she was concerned that very young girls couldn't properly understand how to use the drug without assistance from an adult.
She invoked her authority under the federal Food, Drug and Cosmetic Act and directed FDA Commissioner Margaret Hamburg to issue "a complete response letter." As a result, "the supplement for nonprescription use in females under the age of 17 is not approved," Hamburg wrote at the time.
The Mayo Clinic has more about emergency contraception.
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