Against GlaxoSmithKline’s objections, former head of the Food and Drug Administration David Kessler will be allowed to testify in front of a jury as an expert for the plaintiffs in a class action suit against the company.

London-based drug giant GSK violated antitrust laws when it filed "sham" petitions to the FDA in an effort to stall generic versions of its popular nasal spray, Flonase, from entering the market, third-party purchasers and generic drugmakers allege.