Shares of Catalyst Pharmaceutical Partners ( CPRX) gained 5.6% after the company said it added Dr. Thomas Kosten to its scientific advisory board.

The company, which develops treatments for drug addiction, saw its shares climb 22 cents to $4.14 Friday morning.

Kosten is currently a professor of psychiatry and neuroscience at Baylor College of Medicine and was previously the chief of psychiatry at Yale University. He founded the Division of Substance Abuse at Baylor and Yale and directs their National Institutes of Health Medications Development Center for substance abuse.