CORAL GABLES, FL, USA I March 25, 2014 I Catalyst Pharmaceutical Partners, Inc. (Nasdaq:CPRX), a specialty pharmaceutical company focused on developing safe and effective approved medicines targeting orphan neuromuscular and neurological diseases, announced today that, at a recently held meeting, the independent Data Monitoring Committee (DMC) overseeing the Company’s ongoing pivotal Phase 3 clinical trial evaluating Firdapse™ for the treatment of Lambert-Eaton Myasthenic Syndrome (LEMS) recommended that the trial be continued as planned based on the committee’s review of safety and clinical data from the trial.

The DMC is a group of experts responsible for the independent review of accumulated clinical safety and efficacy data obtained in the Company’s clinical trial, in order to safeguard the interests and safety of participants and future patients. The DMC considers study-specific data, as well as relevant background knowledge about the disease, test agent or patient population under study.

The international, multicenter Firdapse™ Phase 3 clinical trial is designed as a randomized, double-blind, placebo-controlled, discontinuation trial enrolling 36 patients diagnosed with LEMS. The trial is being conducted at 22 centers in the United States, Canada, South America and Europe.

About LEMS

Lambert-Eaton Myasthenic Syndrome, or LEMS, is a rare autoimmune disorder characterized by muscle weakness of the limbs. The disease is caused by an autoimmune reaction where antibodies are formed against the connection between nerves and the muscles they supply. Often, LEMS is associated with an underlying malignancy, most commonly small-cell lung cancer, and in some individuals, LEMS is the first symptom of such malignancy. LEMS generally affects the extremities, especially the legs. As the disease most affects the parts of limbs closest to the trunk, difficulties with climbing stairs or rising from a sitting position are commonly noted. Physical exercise and high temperatures tend to worsen the symptoms. Other symptoms occasionally seen include weakness of the muscles of the mouth, throat, and eyes. Individuals affected with LEMS also may have a disruption of the autonomic nervous system, including dry mouth, constipation, blurred vision, impaired sweating, and/or hypotension.

About Catalyst Pharmaceutical Partners

Catalyst Pharmaceutical Partners, Inc. is a specialty pharmaceutical company focused on the development and commercialization of novel prescription drugs targeting rare (orphan) neuromuscular and neurological diseases, including Lambert-Eaton Myasthenic Syndrome (LEMS), infantile spasms, and Tourette Syndrome. Catalyst’s lead candidate, Firdapse™ for the treatment of LEMS, is currently undergoing testing in a global, multi-center, pivotal Phase 3 trial and has received Breakthrough Therapy Designation from the U.S. Food and Drug Administration (FDA). In 2012, Catalyst licensed Firdapse™ from BioMarin and Catalyst assumed management of the Phase 3 pivotal trial, initiated by BioMarin. Firdapse™ is the first and only European approved drug for symptomatic treatment in adults with LEMS.

Catalyst is also developing a potentially safer and more potent vigabatrin analog (designated CPP-115) to treat infantile spasms, and epilepsy, as well as other neurological conditions associated with reduced GABAergic signaling, like post-traumatic stress disorder and Tourette Syndrome. CPP-115 has been granted U.S. orphan drug designation for the treatment of infantile spasms by the FDA and has been granted E.U. orphan medicinal product designation for the treatment of West Syndrome by the European Commission.

SOURCE: Catalyst Pharmaceuticals