The firm pleaded guilty to criminal charges of violating the Prescription Drug Marketing Act and was allowed to stay in business.

FORBES: The Dark Side of Whistleblowing

On Tuesday, the FDA said its decision was in response to an amended marketing plan from the drug's maker, Teva Pharmaceuticals, to sell Plan B without a prescription to women 15 and older.

BBC: US morning-after pill approved for 15-year-olds