Proton-Pump Inhibitors (PPI) Lawsuit

What Is This Lawsuit About?

The proton-pump inhibitor (PPI) lawsuit involves over 11,322 pending cases consolidated in MDL 2789 in the District of New Jersey, alleging that manufacturers of widely used heartburn and acid reflux drugs failed to adequately warn patients about the serious risks of long-term use — particularly chronic kidney disease, acute kidney injury, and kidney failure.

Proton-pump inhibitors are among the most commonly used medications in the world. Brand names include Nexium, Prilosec, Prevacid, Protonix, Dexilant, and Aciphex, as well as widely available generic and over-the-counter versions. An estimated 15 million or more Americans use PPIs, and many use them for years or even decades — far longer than originally intended.

Beginning in 2016, landmark studies published in JAMA Internal Medicine and other major medical journals established that long-term PPI use is associated with significantly elevated risks of kidney damage, stomach cancer, bone fractures, and other serious conditions. Plaintiffs allege that drug manufacturers knew or should have known about these risks and failed to provide adequate warnings to patients and prescribing physicians.

If you or a loved one took a PPI and developed kidney disease, stomach cancer, or other serious complications, you may be eligible to file a claim. For information about similar pharmaceutical lawsuits, see the Ozempic stomach paralysis lawsuit. Note that the PPI litigation is separate from the Zantac (ranitidine) litigation, which involved a different drug class and suffered a significant Daubert setback when the court excluded plaintiffs' expert testimony on cancer causation.

Who Qualifies?

You may qualify for the PPI lawsuit if you regularly took a proton-pump inhibitor and subsequently developed kidney disease or another serious health condition. An experienced attorney can evaluate your specific case during a free consultation.

Which PPI Drugs Are Involved?

The litigation covers all major proton-pump inhibitors, including both prescription and over-the-counter formulations. If you took any of the following drugs and developed kidney damage or another qualifying condition, you may have a claim:

How PPIs Cause Kidney Damage

Research has identified several pathways through which long-term PPI use can damage the kidneys. Understanding these mechanisms is important because kidney damage from PPIs often develops gradually and without obvious symptoms until the condition is advanced.

Research indicates that PPI-induced kidney damage can occur through acute interstitial nephritis (an inflammatory reaction in the kidneys), gradual progression to chronic kidney disease through sustained low-level damage, and disruption of mineral absorption (particularly magnesium) that stresses kidney function over time. Many patients are unaware their kidneys are being affected until significant, potentially irreversible damage has occurred.

Lawsuit Timeline

The PPI litigation has been building since 2016 when major studies established the kidney damage connection. Here are the key milestones in this mass tort:

Settlement Amounts & Projections

No global PPI settlement has been reached yet as of March 2026. However, with over 11,322 cases pending and bellwether trials being prepared, legal analysts project the following potential settlement ranges based on the severity of kidney injuries:

Settlement amounts will be influenced by factors including the specific kidney diagnosis (acute injury vs. chronic disease vs. failure), the duration and type of PPI used, the patient's age and overall health, and whether the manufacturer's labeling was adequate at the time of use. For more on how settlements are calculated, see our guide on mass tort settlement amounts and how settlement funds are distributed.

How to File a Claim

Filing a PPI kidney damage claim involves several steps. An experienced mass tort attorney can guide you through the process at no upfront cost. Learn more about the overall process in our guide on how to join a mass tort lawsuit.

Named Defendants

Multiple pharmaceutical companies are named as defendants in the PPI litigation, reflecting the fact that several major manufacturers make and market these widely used drugs:

Plaintiffs allege that these companies knew or should have known about the kidney damage risks associated with long-term PPI use but failed to update their drug labeling, continued to market PPIs for extended use, and did not adequately warn patients or prescribing physicians about the dangers.

Scientific & Medical Evidence

The connection between long-term PPI use and kidney damage is supported by a substantial body of peer-reviewed scientific research:

• JAMA Internal Medicine (2016): A large study of over 10,000 participants found that PPI users had a 20-50% higher risk of developing chronic kidney disease compared to non-users, even after adjusting for other risk factors.
• Journal of the American Society of Nephrology (2016): Research found that PPI users had a significantly elevated risk of acute kidney injury and chronic kidney disease, with risk increasing with duration of use.
• Kidney International (2017): Study confirmed the association between PPI use and progressive kidney function decline, noting that many patients progress from acute kidney injury to chronic kidney disease silently.
• Gut (2017-2018): Studies published in this leading gastroenterology journal linked long-term PPI use to a 2-4 times higher risk of stomach cancer, even after eradication of Helicobacter pylori infection.
• BMJ Open (2019): A systematic review and meta-analysis confirmed the association between PPI use and increased risk of chronic kidney disease, acute kidney injury, and end-stage renal disease.
• FDA Safety Communications (2010-2014): The FDA issued multiple safety communications about PPI risks, including bone fractures (2010), hypomagnesemia (2011), and Clostridium difficile infections (2012), establishing a pattern of emerging safety concerns.

The cumulative weight of this evidence forms the scientific foundation of the litigation. For information on how scientific evidence is evaluated in mass tort cases, see our guide on what is a bellwether trial and how mass tort lawsuits work.