Lawyers from several prominent firms are gearing up for a fight over which judge should oversee potentially hundreds of lawsuits filed over the pharmaceutical drug Elmiron.

About 80 lawsuits allege that Elmiron, used to treat a chronic bladder infection called interstitial cystitis, causes eye problems. Most cases are in either Pennsylvania or New Jersey, the headquarters of defendant Janssen Pharmaceuticals and its parent corporation, Johnson & Johnson.