The Judicial Panel on Multidistrict Litigation centralized 45 federal lawsuits involving injuries from testosterone replacement therapies into a multidistrict litigation in the Northern District of Illinois. The lawsuits involved multiple manufacturers and drugs. Centralizing the cases was deemed the best solution to address common factual and regulatory issues across all testosterone replacement therapy cases, which were expected to number in the thousands. Judge Matthew Kennelly was selected to oversee the coordinated pretrial proceedings.