Allergan plc acquired the existing and outstanding $450 million aggregate principal amount of the 4.875% Senior Notes due 2021 (the 4.875% Notes) issued by Forest Labs pursuant to an indenture (as amended and supplemented, the 4.875% Notes Indenture), dated January 31, 2014, among Forest Labs, the Company, as guarantor (the Parent Guarantor), and Wells Fargo Bank, National Association, as trustee (the Trustee), and entered into a supplemental indenture to the 4.875% Notes Indenture (the 4.875% Notes Supplemental Indenture), dated January 1, 2018, among Allergan Sales, the Parent Guarantor and the Trustee, pursuant to which Allergan Sales assumed Forest Labs' obligations with respect to the 4.875% Notes and the 4.875% Notes Indenture and the Parent Guarantor fully, unconditionally and irrevocably guaranteed Allergan Sales' obligations under the 4.875% Notes Indenture and the 4.875% Notes. Also as a result of the Merger, on January 1, 2018, Allergan Sales acquired the existing and outstanding $1,200 million aggregate principal amount of the 5.00% Senior Notes due 2021 (the 5.00% Notes) issued by Forest Labs pursuant to an indenture (as amended and supplemented, the 5.00% Notes Indenture), dated December 10, 2013, among Forest Labs, the Parent Guarantor and the Trustee, and entered into a supplemental indenture to the 5.00% Notes Indenture (the 5.00% Notes Supplemental Indenture), dated January 1, 2018, among Allergan Sales, the Parent Guarantor and the Trustee, pursuant to which Allergan Sales assumed Forest Labs' obligations with respect to the 5.00% Notes and the 5.00% Notes Indenture and the Parent Guarantor fully, unconditionally and irrevocably guaranteed Allergan Sales' obligations under the 5.00% Notes Indenture and the 5.00% Notes.