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Dechert LLP

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Douglas E. Fleming III

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Dechert LLP

Work Department

Product Liability and Mass Torts


Douglas E. Fleming III focuses on complex litigation, specifically matters concerning mass torts, product liability, environmental toxic torts, and insurance. Mr. Fleming regularly represents clients from the chemical, pharmaceutical, medical device, consumer product, building materials and insurance industries. His clients have included numerous Fortune 500 companies located nationwide involved in mass tort litigation filed across multiple federal and state jurisdictions. 

Mr. Fleming has extensive experience litigating cases at both the trial and appellate levels throughout the United States, including examining and preparing fact and expert witnesses for deposition, trial and legislative testimony. In addition to arguing complex motions before courts across multiple jurisdictions, Mr. Fleming has also written briefs in the United States Supreme Court. 

As a former New York City Public Attorney, Mr. Fleming has participated in numerous pro bono matters, acting as a key lawyer in multiple trials relating to high-profile shootings. He has represented the City of New York, as well as indigent plaintiffs and non-profit organizations.


Vice-Chair, Pharmaceutical, Medical Device and Bioscience General Committee, Tort Trial & Insurance Practice Section of American Bar Association (September 2018-2019 term); Board of Directors, St. John's University School of Law Alumni, New York Chapter


University of Notre Dame, B.A., 1991; St. John’s University School of Law, J.D., 1994, magna cum laude, Articles and Comments Editor of St. John’s Law Review

United States: Dispute resolution

Product liability, mass tort and class actions: pharmaceuticals and medical devices - defense

Within: Product liability, mass tort and class actions: pharmaceuticals and medical devices - defense

Highly regarded in the pharmaceutical space, Dechert LLP is particularly experienced in handling product liability, mass tort and class actions for manufacturers and distributors. Jointly led by New York-based Sheila Birnbaum and Mark Cheffo, the team is representing Purdue Pharma as national counsel in over 1,400 cases regarding its prescription opioid medication, and is defending Pfizer as lead national counsel in litigation relating to the antidepressant Zoloft, which allegedly causes birth defects in children when taken during pregnancy. The practice group also continues to represent AbbVie in national product liability litigation involving testosterone replacement therapy AndroGel, including an MDL in Chicago in which Nathan Hoffman takes the co-trial counsel role. Moreover, the team is acting as lead appellate counsel for Johnson & Johnson in the mass tort litigation claiming personal injury from use of anti-psychotic medication Risperdal. Philadelphia-based Ben Barnett and Douglas Fleming in New York are other key members of the practice group.

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