The purpose of this extension study is to evaluate maintenance of Hidradenitis Suppurativa Clinical Response (HiSCR response) in either continuous or interrupted therapy (using a randomized withdrawal period) of two dose regimens and to assess long-term efficacy, safety and tolerability of Secukinumab in subjects with moderate to severe hidradenitis suppurativa completing either of the 2 Phase III studies. This is an expanded access trial for the core trials CAIN457M2301 (NCT03713619) and CAIN457M2302 (NCT03713619).