Not Accepting Cases

Januvia, Byetta and Victoza Lawsuits

Judges consolidated lawsuits against the makers of Type 2 diabetes drugs Januvia, Janumet, Byetta and Victoza in MDL No. 2452 in California federal court. Plaintiffs claim drug manufacturers failed to warn about the risk of pancreatic cancer and pancreatitis.

Prescription drugs Januvia, Janumet, Byetta and Victoza are popular Type 2 diabetes treatments, but reports of dangerous side effects including pancreatitis and pancreatic cancer raised questions about whether the drugs’ risks outweigh their benefits. People who suffered from these side effects filed lawsuits against the makers of these drugs, Merck (Januvia and Janumet), Amylin and Eli Lilly (Byetta) and Novo Nordisk (Victoza).

In May 2013, the U.S. Food and Drug Administration issued safety communications linking the drugs, collectively called incretin mimetics, to serious complications such as pancreatic diseases. The agency also advised the public it was investigating the drugs’ link to pancreatic cancer.

After the agency stated some studies suggested a link between these drugs and pancreatic cancer, the first lawsuits alleging the drugmakers failed to warn about the risk landed in courts across the country.

California Federal Court House
Federal judge in California dismissed all cases in the MDL in '15

In 2013, the United States Judicial Panel on Multidistrict Litigation (JPML) consolidated these cases in California federal court in multidistrict litigation (MDL) number 2452, In Re: Incretin Mimetics Products Liability Litigation.

In November 2015, the presiding judge, Anthony J. Battaglia, granted summary judgement in favor of the defendants. Summary judgement means the judge dismissed all cases in the MDL. Plaintiff’s attorneys filed an appeal in September 2016 claiming the judge misinterpreted the law.

So far, plaintiffs are awaiting the decision from the Ninth Circuit Court of Appeals, but some law firms continue to accept cases and some people still filed lawsuits after the judge’s decision.

History and Status of MDL No. 2452

In August 2013, the JPML transferred the first 53 cases against Merck, Amylin, Eli Lilly and Novo Nordisk to MDL No. 2452. The original cases came from state courts in Arizona, California, Colorado, Kansas, Missouri, Oklahoma and Pennsylvania.

The purpose of centralizing case is to conserve resources. Since all of the lawsuits involving Januvia, Janumet, Byetta and Victoza claim the drugs caused pancreatic cancer and pancreatitis, the court felt it would be more efficient because all cases would likely use the same experts and go through the same discovery process.

According to a complaint, “Defendants willfully, wantonly, and with malice withheld the knowledge of increased risk of pancreatic cancer in users of the Drugs to prevent any chances of their product’s registration being delayed or rejected by FDA.”

Lawsuits in the MDL list several allegations against manufacturers, including:
  • The faulty formulation of Januvia, Janumet, Byetta and Victoza increased the risk of pancreatic cancer.
  • The drugs are defective and cause “unreasonable and dangerous side effects.”
  • The manufacturers failed to adequately test the incretin mimetic drugs and monitor side effects before selling them.
  • The manufacturers should have known about the side effects but didn’t warn doctors or patients about the risks.
  • The drugmakers concealed the risks of pancreatitis and pancreatic cancer from health care providers and the public.
  • Drugmakers do not specifically include the words “pancreatic cancer” on the drugs’ labels.
  • Current warnings for Januvia, Janumet, Byetta and Victoza are inadequate.

Defendants Argue Preemption

In November 2015, Battaglia granted the manufacturer’s request to dismiss all the cases in the MDL under a motion called summary judgement. Defendants argued that the plaintiffs had no failure-to-warn case because there was no way the FDA would have approved their label change to warn of pancreatic cancer. Therefore, drugmakers claimed they should not be held liable for failing to warn about pancreatic cancer.

Pancreatic Cancer on a Cellular Level
Drugmakers claimed they should not be held liable for failing to warn about pancreatic cancer

This concept is called preemption. According to preemption, state failure-to-warn claims are void when there is clear evidence that the FDA — a federal agency — would not have approved a label change.

“Defendants have demonstrated by clear evidence that the FDA would have rejected a reference to pancreatic cancer in the product labeling during the time in which Plaintiffs’ claims accrued,” Battaglia said in his order. “Plaintiffs’ challenges to the FDA’s conclusions regarding pancreatic cancer risk are insufficient to overcome preemption in light of the extensive regulatory history of the drugs at issue.”

Battaglia also disqualified the plaintiffs’ expert witness, Dr. Thomas Fleming, and did not permit a substitute expert.

Plaintiffs Appeal

In September 2016, plaintiff’s attorneys filed an appeal on behalf of the MDL. According to the brief accompanying the appeal to the Ninth Circuit U.S. Court of Appeals, Battaglia misinterpreted the U.S. Supreme Court preemption law.

So far, the Ninth Circuit has yet to return its decision. At the time the judge granted defendants summary judgment, there were 749 cases pending in the MDL. More plaintiffs joined the MDL after the decision.

Case Law in Plaintiffs’ MDL Appeal

In an appeal, plaintiffs argued that Judge Battaglia “misunderstood the lessons” of preemption case law. The judge overlooked or misinterpreted U.S. Supreme Court decisions in these cases: Wyeth v. Levine and Buckman Co. v. Plaintiffs’ Legal Committee.

The plaintiffs argue Battaglia made a mistake when he ruled that newly acquired information on pancreatic cancer was irrelevant to the issue of preemption.

The appeal said the judge also failed to properly interpret a U.S. Supreme Court decision called Wyeth v. Levine. Under that ruling, the defendants failed to provide evidence that the FDA would have rejected a label update by the manufacturers. Drug manufacturers are allowed to strengthen safety language without prior FDA approval, the appeal said.

The judge also should not have disqualified Dr. Thomas Fleming, the plaintiffs’ expert, or deny additional discovery. Battaglia disqualified the expert without proper facts and this resulted in “extraordinary prejudice” to plaintiffs, the appeal states.

Examples of MDL Lawsuits

People who filed lawsuits in the MDL claim the drugmakers overpromoted the drugs as effective and safe and failed to warn about the dangers of pancreatic cancer. In addition to an increasing number of lawsuits, Merck, Amylin, Eli Lilly and Novo Nordisk incurred criticism because patients and physicians were not adequately warned about serious, potentially fatal, health risks. Had they received adequate warnings, many of the patients who developed pancreatic cancer or acute pancreatitis could have chosen other diabetes treatments, lawsuits claim.

Plaintiffs who filed lawsuits against incretin mimetic drugmakers:
Guy Riley

Guy Riley is a Maryland man who sued Merck, Amylin and Eli Lilly in California state court. His wife, Kathleen, was prescribed Januvia and Byetta to manage Type 2 diabetes beginning in 2005. Doctors diagnosed her with pancreatic cancer in 2009, and she died later that year. Riley filed a wrongful death claim in California state court in October 2012. His complaint also includes several claims filed on behalf of his wife’s estate, including, among other claims, strict liability, negligence, deceit by concealment and misrepresentation. He alleges that the drugs caused his wife “severe mental and physical pain and suffering prior to her death, along with economic loss.” The case was removed to the U.S. District Court for the Southern District of California, where it is now pending.

Regina Kelly

The estate of Regina Kelly filed a suit against Merck, Amylin and Eli Lilly. She developed pancreatic cancer after taking Januvia and Byetta. Her estate alleges that the drugs “permanently and severely injured” her, ultimately causing her death. The estate seeks relief for her physical and mental injuries, the cost of her medical expenses, economic damages, punitive damages and other damages. The case is pending in federal court in California.

Joel Whitley

Joel Whitley’s mother, Marcia Whitley, took Januvia in August 2007. The following month, her doctor also prescribed Janumet. She died of pancreatic cancer in August 2009. Her son filed a personal injury claim on behalf of her estate as well as a wrongful death claim. The case is pending in the federal MDL.

Linda Jean Howard

Linda Jean Howard of Alabama developed acute pancreatitis after her doctor prescribed Victoza and Byetta. She alleged that if she or her doctor had known about the risk of developing pancreatitis, she would never have taken the drugs. She filed a lawsuit in federal court in August 2013. Her complaint alleged that the defendants conduct caused her to incur expenses for “physicians, surgeons, nurses, hospital care, medicine, hospices, X-rays, medical supplies and other medical treatment.” She also claimed it caused her to lose “actual and future income.”

Please seek the advice of a medical professional before making health care decisions.

Related Pages
Michelle Llamas, Senior Content Writer
Written By Michelle Llamas Senior Writer

Michelle Llamas has been writing articles and producing podcasts about drugs, medical devices and the FDA for seven years. She specializes in fluoroquinolone antibiotics, vaccines and products that affect women’s health such as Essure birth control, transvaginal mesh and talcum powder. Michelle collaborates with experts, including board-certified doctors, patients and advocates, to provide trusted health information to the public. Some of her qualifications include:

  • American Medical Writers Association (AMWA) Engage Committee and Membership Committee member
  • Centers for Disease Control and Prevention (CDC) Health Literacy certificates
  • Original works published or cited in The Lancet, British Journal of Clinical Pharmacology and the Journal for Palliative Medicine
Edited By

22 Cited Research Articles

  1. In Re: Incretin-Based Therapies Products Liability Litigation, Jean Adams, et al. v. Merck Sharp & Dohme Corp., et al., No. 15-56997, 9th Cir.
  2. In Re: Incretin-Based Therapies Products Liability Litigation. Master Form Complaint for Damages. MDL No. 2452.Retrieved from
  3. Maylan, T. (2015, November 11). Preemption Summary Judgement Granted in Incretin-Mimetic Multidistrict Litigation. Retrieved from
  4. Lexis Legal News. (2016, September 8). Plaintiffs Tell 9th Circuit Incretin Mimetic MDL Court Got Preemption Law Wrong. Retrieved from
  5. AstraZeneca. (2014). AstraZeneca Annual Report and Form 20-F Information 2014. Retrieved from:
  6. Cortez, M. (2007, July 10). Merck's Januvia, Lilly's Byetta Work No Better Than Older Drugs. Retrieved from
  7. Edney, A. (2012, February 28). Merck Warned by FDA on Failure to Study Januvia Treatment for Side Effects. Retrieved from
  8. Howard v. Novo Nordisk Inc., No. 6:13-cv-01516-LSC (filed Aug. 16, 2013 N.D. Ala.).
  9. Judicial Panel on Multidistrict Litigation. Order Consolidating Cases for Purposes of Discovery, Scott v. Merck & Co, Inc., et al., 12cv2549-AJB (S.D. Cal. Feb. 4, 2013).
  10. Judicial Panel on Multidistrict Litigation. (2015). Pending MDL Dockets by District. Retrieved from
  11. Merck & Co. (2009, September 25). Merck Statement About JANUVIA (sitagliptin) and JANUMET (sitagliptin/metformin). Retrieved from
  12. Raesky v. Merck & Co., Inc., et al., 13cv76-AJB (S.D. Cal., filed Jan. 11, 2013).
  13. Reinberg, S. (2011, September 23). Popular diabetes drugs may raise pancreatic cancer risk, study suggests. Retrieved from
  14. Riley v. Merck & Co., Inc., et al., 12cv2556-AJB (S.D. Cal., filed Oct. 20, 2012).
  15. U.S. Department of Health and Human Services. (2012, February 17). Merck Sharp and Dohme Corp. [Warning letter].
  16. U.S. Food and Drug Administration. (2008, August 18). Byetta (exenatide) - Renal Failure.
  17. U.S. Food and Drug Administration. (2008, August 18). Information for Healthcare Professionals: Exenatide (marketed as Byetta). Retrieved from
  18. U.S. Food and Drug Administration. (2008, August 18). Byetta (exenatide).
  19. U.S. Food and Drug Administration. (2009, November 2). Byetta Label Revised to Include Safety Information on Possible Kidney Problems [Press release]. Retrieved from
  20. U.S. Food and Drug Administration. (2009, September 25). Information for Healthcare Professionals - Acute pancreatitis and sitagliptin (marketed as Januvia and Janumet). Retrieved from
  21. Whitley v. Merck, No. 3:13-cv-01842 (filed Aug. 8, 2013 S.D.Cal.).
  22. U.S. Food and Drug Administration. (2013, March 14). FDA drug safety communication: FDA investigating reports of possible increased risk of pancreatitis and pre-cancerous findings of the pancreas from incretin mimetic drugs for type 2 diabetes [Press release]. Retrieved from:
View All Sources
Who Am I Calling?

Calling this number connects you with Wilson and Peterson, LLP or one of its trusted legal partners. A law firm representative will review your case for free.

Wilson and Peterson, LLP funds Drugwatch because it supports the organization’s mission to keep people safe from dangerous drugs and medical devices.

(888) 645-1617

To contact Drugwatch Managing Editor Kevin Connolly, call (855) 839-9780.