Catalyst Pharmaceuticals, Inc.'s plan to expand Firdapse (amifampridine phosphate) to a broader range of inherited neuromuscular disorders has stalled for a second time with a Phase III clinical trial failure in patients with anti-MuSK antibody-positive myasthenia gravis, following a failed clinical trial in another rare neuromuscular condition last year.
The company announced the latest study failure with its second quarter financial results on 11 August