U.S. Senator Charles Grassley asked 16 drugmakers, including Pfizer Inc., AstraZeneca Plc and Eli Lilly & Co., to reveal how they treat whistleblowers who file complaints under the False Claims Act. Grassley, an Iowa Republican, sent letters June 28 that posed eight questions such as how companies notify employees of the law, how they treat whistleblowers and what changes they have made in response to a 2009 law extending anti-retaliation protections.