Attorneys at Meshbesher & Spence represented people who took the diet drugs known as fen-phen and suffered serious side effects, including potentially fatal heart valve damage. The drugs were withdrawn from the market after a Mayo Clinic study linked fen-phen to serious injuries, but not before an estimated 6 million people already took the drug. Plaintiffs have reportedly collected more than $4 billion in settlements from the manufacturers of the dangerous diet drugs.