Overview Phase 3 Extension Study of Dexpramipexole in ALS Status: Terminated Trial end date: 2013-02-01 Target enrollment: Participant gender: Summary The purpose of the study is to collect long-term safety data from subjects with Amyotrophic Lateral Sclerosis (ALS) exposed to dexpramipexole. Phase: Phase 3 Details Lead Sponsor: Knopp BiosciencesCollaborator: BiogenTreatments: Pramipexole