Karen Barth Menzies is a leading anti-depressant drug products liability attorney. She has stepped up her fight in the past few years, advocating that pharmaceutical companies should warn about the alleged risks of anti-depressant drugs.

She is the lead attorney on dozens of cases involving suicide or violence caused by anti-depressants. Menzies filed the first Paxil-withdrawal class action against GlaxoSmithKline PLC in 2001.