Florida-based Catalyst Pharmaceuticals is attempting to show in court that the price of a newly approved treatment for a rare autoimmune disease and pressure from U.S. Sen. Bernie Sanders lead to the approval of a rival treatment.

Catalyst Pharmaceuticals Inc., under fire for a high price tag on a rare disease drug, sued the U.S. Food and Drug Administration to challenge the recent approval of a lower-cost rival medicine.

Jacobus Pharmaceutical Co. Inc. won U.S. approval for the first drug to treat children with Lambert-Eaton myasthenic syndrome, a rare autoimmune disorder.

The U.S. Food and Drug Administration approved Catalyst Pharmaceuticals Inc.’s drug Firdapse to treat a rare autoimmune disease.

Catalyst Pharmaceuticals is slashing its workforce by about 30 percent in an effort to conserve capital and save its investigational drug program for the treatment of LEMS and CMS.