Catalyst Pharmaceutical Partners, Inc. (NasdaqCM: CPRX) announced today that it has signed a non-binding Letter of Intent with the National Institute on Drug Abuse (NIDA) to conduct a U.S. Phase II(b) clinical trial evaluating CPP-109, Catalyst's formulation of vigabatrin, for the treatment of cocaine addiction. It is anticipated that NIDA, under their agreement with Veteran's Administration Cooperative Studies Program, will provide substantial resources for the trial and that Catalyst will contribute approximately $2.5 million in resources as part of the estimated $10 million trial cost.