Lemtrada Stroke and Arterial Dissection Lawsuit Information


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MS patients treated with Lemtrada may be at risk for serious and potentially fatal side effects, including stroke and arterial dissections occurring in the head or neck.

Lemtrada is an FDA-approved disease-modifying treatment designed to slow down the progression of relapsing-remitting multiple sclerosis (MS). Because of its safety profile, Lemtrada is only available in the United States through a restricted distribution program and its use is generally reserved for patients who have had an inadequate response to two or more MS drugs. In addition to other possible Lemtrada side effects, the FDA has issued a warning about the risk of rare but serious strokes and head or neck arterial dissections possibly leading to permanent disability or death in MS patients who received Lemtrada. If you or someone you loved has suffered a stroke or arterial dissection and you believe the MS treatment Lemtrada to be the cause, our consumer advocates at the Consumer Justice Foundation can help. We are committed to protecting the rights of consumers harmed by dangerous and defective medications and we can help put you in touch with an experienced Lemtrada injury lawyer today.

Lemtrada Alternatives for Multiple Sclerosis

If you have been diagnosed with a relapsing form of MS and you are considering Lemtrada treatment, it is important to understand the potential risks associated with the intravenous infusion. Lemtrada was approved by the FDA based on the results of clinical trials that showed its potential to reduce relapse rates in patients with relapsing forms of MS, but the drug has since been linked to serious and potentially deadly side effects in MS patients. MS is a condition that affects more than two million people worldwide and treatment generally targets the symptoms of the disease, as the cause of MS is unknown. There is no cure for MS, but there are natural alternatives to Lemtrada that may help reduce symptoms or slow the progression of the disease, including the following herbs and supplements:

  • Agrimony
  • Chamomile
  • Barberry
  • Dandelion root and leaf
  • Bee pollen
  • Echinacea
  • Ginseng
  • Lemongrass
  • Magnesium
  • Probiotics
  • Sage
  • St. John’s wort
  • Turmeric
  • Vitamin A
  • Vitamin B-1, B-6 and B-12
  • Vitamin C
  • Vitamin D
  • Vitamin E
  • Zinc
  • Calcium
  • Cranberry
  • Coenzyme Q10
  • Elderflower
  • Fish or cod liver oil
  • Ginger
  • Gingko biloba

FDA, Lemtrada and Side Effects

September 2013 – Lemtrada is approved by European regulators.

December 2013 – The FDA refuses to approve Lemtrada, citing the need for additional trials to evaluate the drug’s safety and effectiveness.

November 2014 – Lemtrada is approved by the FDA.

November 2018 – The FDA issues a drug safety communication warning that serious and potentially life-threatening cases of stroke and head or neck arterial dissection have occurred in MS patients treated with Lemtrada. The agency updates Lemtrada’s Boxed Warning to include information about these risks.

April 2019 – The European Medicines Agency restricts the use of Lemtrada while it conducts a safety review of the MS drug.

Lemtrada Side Effect Studies

October 2015 – A case study highlights an ischemic stroke with spontaneous multiple cervical artery dissections occurring in a 40-year-old woman with relapsing MS during a first course of Lemtrada treatment.

February 2019 – A case study highlights a fatal bilateral intracerebral hemorrhage following treatment with Lemtrada for MS. According to the study conclusion, “Under consideration of the clinical cause and the neuropathological findings, it is suggested that a causal connection exists between the alemtuzumab treatment and the ICH, which was possibly mediated by vascular damage.”

April 2019 – A case study published by The Lancet highlights the risk of intracerebral hemorrhage occurring during Lemtrada treatment, identifying five additional cases of intracerebral hemorrhage in MS patients treated with Lemtrada.

Why We Think Sanofi Should Be Held Liable for Lemtrada Side Effects

Patients suffering from serious medical conditions like multiple sclerosis deserve to be informed of the risks of the treatments they undergo and drug companies like Sanofi that fail to adequately warn patients and healthcare providers about the potential side effects associated with their medications must be held accountable. When used to treat relapsing MS, Lemtrada has been known to pose certain risks to users, but these risks were not identified when many MS patients began using Lemtrada. As more information comes to light about the potential for Lemtrada to cause stroke and head or neck arterial dissection in MS patients, lawsuits are expected to be filed by former Lemtrada users, accusing Sanofi of:

  • Manufacturing a defective drug
  • Failing to adequately research the side effects of Lemtrada treatment in MS patients
  • Failing to warn patients and the medical community about the risk of serious and potentially life-threatening strokes and arterial dissections in Lemtrada users
  • Making misleading statements about the safety and efficacy of Lemtrada
  • Overstating the benefits of Lemtrada and downplaying its risks

What should you do? If you have suffered stroke, arterial dissection or another serious side effect, you should contact a lawyer as soon as possible to discuss filing a Lemtrada injury lawsuit.

Although Lemtrada therapy has been shown to reduce the number of MS relapses in patients by about two-thirds, compared to taking a placebo, the potential risk of stroke and head or neck arterial dissection has raised serious concerns about the safety of Lemtrada. Product liability lawyers across the country are currently investigating claims by MS patients who suffered strokes, head or neck arterial dissections and other side effects allegedly caused by Lemtrada treatment. If you or a loved one received Lemtrada for multiple sclerosis and experienced a stroke or arterial dissection within a few days of the treatment, you may be entitled to financial compensation for your medical expenses, lost wages, pain and suffering, and other damages. Contact an experienced Lemtrada injury attorney as soon as you can to discuss the possibility of filing a Lemtrada lawsuit against Sanofi.

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