https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=overview.process&ApplNo=211404
https://www.pharmacompass.com/pdf/news/fda-confirms-paragraph-iv-patent-challenge-of-advil-pmibuprofen-and-diphenhydramine-citrate-tablets-1520055993.pdf
https://www.pharmacompass.com/pdf/news/fda-confirms-paragraph-iv-patent-challenge-of-advil-pm-ibuprofen-and-diphenhydramine-citrate-capsules-1500527011.pdf
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