A plaintiffs expert in the multidistrict litigation over the Chantix antismoking drug has moved to unseal court records in the advance of a U.S. Food and Drug Administration meeting next month to consider whether warnings about suicide risk are warranted.

Dr. Joseph Glenmullen, an expert causation witness for the plaintiffs, and Thomas Moore, a drug-safety researcher who also was a consulting expert in the Chantix litigation, called for the unsealing of thousands of Pfizer Inc. internal documents.