No Longer Accepting Cases

The anti-asthma drug Xolair was linked to higher rates of many life-threatening side effects in clinical trials. In September 2014, the FDA warned about a possible increased risk of cardiovascular and cerebrovascular side effects.


Xolair is an injection medication that is designed to prevent asthma attacks in patients who do not respond to corticosteroid asthma inhalers. It is also sometimes used to treat chronic hives.

FDA Warnings for Xolair

The U.S. Food and Drug Administration (FDA) has been reviewing side effects of Xolair since 2009, when the EXCELS clinical trial found early evidence of blood vessel problems in the heart and brain.

After the 5-year safety study was complete, the FDA warned about evidence of cardiovascular and cerebrovascular side effects. However, due to weaknesses in how the study was designed and carried out, the FDA could not definitively confirm increased risks.

Side Effects

The most serious side effects identified in the EXCELS study included:

  • Mini-strokes (transient ischemic attacks)
  • Heart attacks
  • Chest pain (sudden, unexpected)
  • Pulmonary hypertension (high blood pressure in arteries of the lungs)
  • Pulmonary embolism (blood clots in the lungs)
  • Venous thrombosis (blood clots in veins)
  • Cancer

What is the problem?

The Clark Firm, LLP is nationally recognized as a class action law firm, but our attorneys are not filing a Xolair class action lawsuit. Instead, we are filing individual lawsuits and concentrating our efforts on providing legal representation to people with the most severe injuries.

About Class Actions

Class action lawsuits are ideal in certain circumstances. You may have already been part of class actions after you purchased a defective product, for example. This type of lawsuit makes sense when it would be financially impractical for everyone to file a lawsuit alone — especially when each person’s potential payout is less than the cost of litigation.

Why Our Law Firm is Filing Individual Lawsuits as Opposed to a Xolair Class Action

Xolair has been linked to some extremely serious and potentially deadly side effects. Our lawyers are concerned that a class action could have disadvantages for people with the most serious injuries. This is why we are filing individual lawsuits instead of a class action.

The problem with class actions is that members may have to accept higher attorneys’ fees or a “low-ball” settlement. The outcome of most class actions depends on a “class representative,” which means most individual cases never go to trial.

Meet Your Attorney

Collen A. Clark

Collen A. Clark is a true advocate for his clients and is passionate about helping Texans that have been injured or wronged.

“Collen’s amazing success in the courtroom and well known dedication to his clients has earned him the recognition of his peers as one of The Top Trial Lawyers in Texas.”

To contact Collen, please fill out the contact form below:

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