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William Essig
OVERVIEW

William V. Essig

Partner

Chicago

One N. Wacker Drive
Suite 4400
Chicago, IL 60606-2833

P 312-214-5617

F 312-759-5646

Bill Essig is an experienced trial lawyer and litigator who defends pharmaceutical, medical device, and consumer product companies against high-stakes product liability claims. With deep experience in multi-district litigation (MDL) and state courts nationwide, Bill has tried cases and provided leadership to trial teams and national coordinating counsel teams.

OVERVIEW

Bill Essig is an experienced trial lawyer and litigator who defends pharmaceutical, medical device, and consumer product companies against high-stakes product liability claims. With deep experience in multi-district litigation (MDL) and state courts nationwide, Bill has tried cases and provided leadership to trial teams and national coordinating counsel teams.

Bill’s approach to litigation defense combines scientific rigor with persuasive advocacy. He is skilled at developing and presenting expert witnesses and translating intricate medical and scientific concepts into compelling courtroom arguments. This can prove crucial in mass tort litigation when the details can make or break a case.

Bill has successfully defended prescription medications and medical devices against thousands of claims. His experience spans antipsychotics, fluoroquinolones, and various medical devices, including surgical staplers, orthopedic implants, and contact lenses. This diverse background allows him to quickly grasp the nuances of new product liability litigations and tailor defense strategies accordingly. Bill has also successfully defeated putative consumer class actions involving over-the-counter medications and personal care products. 

Beyond the courtroom, Bill helps clients achieve favorable outcomes through mediation and alternative dispute resolution. Committed to giving back, Bill maintains an active pro bono practice, focusing on cases referred by Ascend Justice in Illinois.

Professional and Community Involvement

Member, Trial Attorneys of America

Board of directors member, Public Interest Law Initiative (PILI)

Adjunct Professor, Northwestern University Pritzker School of Law, 1998-2008

Class agent and alumni interviewer, Yale University

Honors

Illinois Super Lawyers, 2025

Martindale-Hubbell AV-Preeminent

EXPERIENCE
Experience

Trials

  • Defended prescription antipsychotic medication in state and federal courts and served as  co-trial counsel for defense verdict in failure-to-warn case in the mass tort program in the Court of Common Pleas in Philadelphia, PA.
  • Defended prescription fluoroquinolone medication in a federal MDL.  Three defense verdicts as a trial team member.
  • Defended enteral nutrition products salesman for major pharmaceutical company in federal Medicare anti-kickback criminal trial in Southern District of Illinois.  Prepared successful motion for judgment of acquittal that was granted at the conclusion of the government’s case.

Drug and Medical Device Litigation

  • Served as national coordinating counsel team member for latex glove allergy MDL and in more than 30 state courts. Team obtained defense verdicts in the client’s only two cases tried to verdict. Involved in all phases of litigation including expert witness preparation and deposing prescribing and treating physicians.
  • Coordinated members of a multiple law firm team for the preparation and presentation at deposition and trial of multiple pharmaceutical sales representatives in a products liability MDL.
  • Served as national counsel team member defending gadolinium-based contrast agents used in magnetic resonance imaging in products liability MDL and state cases.
  • Prepared and defended expert witnesses for deposition and trial for a products liability litigation involving allegations of birth defects from in utero exposure to a prescription anticonvulsant medication in the mass tort program of the Court of Common Pleas in Philadelphia. 

Consumer Fraud Class Action Defense

  • Defended over-the-counter pharmaceutical and personal care products companies from putative consumer fraud class actions related to product efficacy and safety, as well as labeling and advertising.

Toxic Tort and Other Litigation

  • Defended product manufacturers and premises liability defendants in asbestos, benzene and other toxic tort litigation.
  • Defended Big Ten university in highly publicized wrongful death case brought by Johnnie Cochran on behalf of the family of a football player who died during pre-season conditioning drills.
  • Represented former pharmaceutical marketing professionals in grand jury investigations, as well as represented corporate officers and employees in SEC investigations and enforcement proceedings.
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