Xeljanz Lawyers Review Cases Nationwide

Xeljanz (tofacitinib) was introduced in 2012, as the first member of a new class of drugs for treatment of rheumatoid arthritis, psoriatic arthritis and ulcerative colitis. However, it now appears that the drug maker failed to adequately research the potential Xeljanz side effects, and failed to warn about serious risks that users may have avoided by taking other medications.

Post-marketing studies have highlighted several categories of major health complications linked to Xeljanz, that were not disclosed to consumers or the medical community. As a result, substantial compensation may be available through a Xeljanz lawsuit for individuals who suffered:

  • Lung Cancer
  • Breast Cancer
  • Colon Cancer
  • Prostate Cancer
  • Pancreatic Cancer
  • Other Cancers
  • Heart Attack/Myocardial Infarction
  • Stroke
  • Cardiac Arrest
  • Cardiovascular Death
  • Pulmonary Embolism (PE)
  • Deep Vein Thrombosis (DVT)
  • Other Serious Blood Clot Injury

All cases are pursued by the lawyers at Saiontz & Kirk, P.A. on a contingency fee basis, which means that there are never any out-of-pocket costs to hire our law firm, and we only receive an attorney fee or expenses if a Xeljanz settlement is obtained for your injury.

To learn more and find out whether you or a loved one may have a Xeljanz case, call 1-800-522-0102 or request a free case review.

Learn More About Xeljanz Class Action Lawsuits

Problems with Xeljaz/Xeljanz XR

Xeljanz and Xeljanz XR are part of a new class of rheumatoid arthritis drugs, known as Janus kinase (JAK) inhibitors, which work in a unique way deep inside the cell to disrupt cellular activities.

The drug was first introduced in 2012, as a second-line treatment for adults with severe rheumatoid arthritis. Approval was expanded to include treatment of active psoriatic arthritis (PsA) in 2017 and for treatment of ulcerative colitis in 2018.

Amid aggressive marketing by Pfizer, Xeljanz has quickly grown to become a “blockbuster” treatment, generating over $1 billion in annual sales. However, it appears that the drug maker knew or should have known about the link between Xeljanz and pulmonary embolism, yet failed to provide adequate warnings for users and the medical community.

Xeljanz Blood Clot Risk

Xeljanz is typically taken at a dose of either 5mg or 10mg twice daily. Although the higher dose has not been established as safe and effective for treatment of rheumatoid arthritis, many doctors have prescribed that double dose of Xeljanz since the manufacturer failed to disclose the potential blood clot side effects.

As part of the approval process, the FDA required Pfizer to conduct a post-marketing study, known as A3921133, which was designed to assess the risk of cardiovascular events.  However, the early results from this Xeljanz study found that at higher doses users were more experience a blood clot the lungs, known as a pulmonary embolism, or wrongful death.

In February 2019, the FDA issued a Drug Safety Communication, providing the first public information about the potential Xeljanz pulmonary embolism risk.

According to preliminary findings of this study, comparing use of 10mg Xeljanz twice daily for rheumatoid arthritis to use of 5mg tablets twice daily and use of other rheumatoid arthritis drugs (Humira, Enbrel and other TNF inhibitors), researchers found:

  • 5x higher risk of pulmonary embolism with higher dose of Xeljanz compared to TNF Inhibitors
  • 3x higher risk of pulmonary embolism with 10mg dose when compared to 5mg Xeljanz for rheumatoid arthritis
  • Higher risk of death from all causes with Xeljanz 10mg twice daily dose

In July 2019, the FDA announced that Pfizer was required to add a Xeljanz black box warning about the risk of blood clots and death among users of the higher dose. Users are now advised to seek immediate medical attention if they experience signs or symptoms of pulmonary embolism, and federal health officials are recommending that doctors closely monitor patients prescribed Xeljanz.

If earlier warnings and information about the Xeljanz blood clot risk had been provided by Pfizer, many individuals nationwide may have avoided a serious or fatal pulmonary embolism, deep vein thrombosis, stroke or other life-threatening injuries.

Pfizer Logo for Xeljanz Lawsuit

Timeline of Xeljanz Case


FDA approves Xeljanz for treatment of adults with rheumatoid arthritis.


Xeljanz sales rapidly grow to generate a new “blockbuster” drug for Pfizer, reaching $927 million in sales by 2016.

Dec 2017

Expanded approval for treatment of active psoriatic arthritis (PsA).

May 2018

Expanded approval for treatment of moderate to severe active ulcerative colitis.

Feb 19, 2019

Pfizer announces preliminary results of Study A3921133, which was required by FDA to evaluate heart risks.

Feb 25, 2019

FDA Safety Communication warns about risk of blood clots in the lungs when 10mg twice daily dose of Xeljanz used with rheumatoid arthritis.

March 2, 2019

European Medicines Agency (EMA) warns that overall incidence of pulmonary embolism with Xeljanz was 5-fold higher with 10mg twice daily dose, compared to other rheumatoid arthritis drugs.

July 26, 2019

The FDA required a new “Boxed Warning” for Xeljanz, which is the strongest label information a drug maker can be required to add.

FDA now warns patients to seek immediate medical attention if they experience signs or symptoms of a blood clot on Xeljanz, which may include:

  • Sudden shortness of breath
  • Chest pain
  • Upper back pain
  • Difficulty breathing
  • Coughing up blood
  • Excessive Sweating
  • Clammy or blue colored skin

(Do not stop taking any drug or change dose without first speaking with your doctor)

Allegations Raised in Xeljanz Class Action Lawsuits

Pfizer had a duty to warn fully research their new-generation drug, and warn about potential Xeljanz risks, so that consumers and doctors could make an informed decision about whether to use the drug.  According to allegations that will be raised in Xeljanz blood clot lawsuits, the pharmaceutical company has:

  • Failed to properly research the Xeljanz side effects before introducing the drug;
  • Failed to promptly follow through on studies to investigate the potential Xeljanz cardiovascular risks;
  • Failed to disclose reports of pulmonary embolism, deep vein thrombosis, stroke and other blood clots on Xeljanz;
  • Failed to provide accurate Xeljanz warnings for consumers and the medical community;
  • Failed to issue a Xeljanz recall or safety warnings about the risks users face at certain doses;

No Fees or Expenses Unless You Receive a Xeljanz Settlement

Saiontz & Kirk, P.A. is a nationally known injury law firm that is focused exclusively on representing individuals, we do not represent corporations or insurance companies.

Over the course of more than 40 years, clients of our law firm have collected more than $1 billion in compensation in cases involving product liability, medical malpractice, automobile accidents and other personal injury lawsuits.

All Xeljanz injury lawsuits will be handled by our attorneys on a contingency fee basis, which means that there are never any out-of-pocket expenses to hire our law firm and we only receive an attorney fee if we secure compensation for our client.

Protect your family and find out if you or a loved one may be eligible for an Xeljanz settlement.

CONTACT OUR XELJANZ LAWYERS No Fees or Expenses Unless a Recovery is Obtained.

  • This field is for validation purposes and should be left unchanged.
Saiontz & Kirk, PA, Attorneys & Lawyers, Baltimore, MD