This is a Phase 2b, international, multicenter, open-label extension study for participants who successfully completed blinded study drug in Study 007. This extension study will evaluate the long-term administration of ataluren administered 3 times per day (TID) at morning, midday, and evening doses of 20, 20, and 40 milligrams/kilogram (mg/kg), respectively, in participants with nonsense mutation Duchenne/Becker muscular dystrophy (nmDBMD).
