Overview Study to Evaluate Amifampridine Phosphate in Patients With MuSK-MG Status: Completed Trial end date: 2020-03-15 Target enrollment: Participant gender: Summary Efficacy and safety of amifampridine phosphate in improving the activities of daily living for patients with antibody positive MuSK myasthenia gravis. Phase: Phase 3 Details Lead Sponsor: Catalyst Pharmaceuticals, Inc.Treatments: 3,4-diaminopyridine4-AminopyridineAmifampridineAntibodies