Two South Florida firms have united to file the first of what they say will be a string of putative mass tort lawsuits across the U.S. over allegations that a drug commonly prescribed for bladder issues could cause permanent retinal damage, vision impairment and blindness.

Kozyak Tropin & Throckmorton partner Benjamin Widlanski and Colson Hicks Eidson partner Francisco Maderal represent named plaintiff Tara O’Flaherty from Charlotte County.