menu

LEMTRADA is a prescription medicine used to treat adults with relapsing forms of multiple sclerosis (MS). Because of its risks, LEMTRADA is generally used in people who have tried 2 or more MS medicines that have not worked well enough. It is not known if LEMTRADA is safe and effective for use in children under 17 years of age.

View IMPORTANT SAFETY INFORMATION

Lemtrada Safety

A look at some of the potential side effects

When considering LEMTRADA as your relapsing MS medicine, it's important to discuss potential common and serious side effects with your healthcare provider.

SELECTED IMPORTANT SAFETY INFORMATION

LEMTRADA can cause serious side effects including autoimmune problems, infusion reactions, stroke, tears in your arteries that supply blood to your brain (carotid and vertebral arteries), some kinds of cancers, thyroid problems, low blood counts (cytopenias), inflammation of the liver, serious infections, progressive multifocal leukoencephalopathy (PML), inflammation of the gallbladder without gallstones (acalculous cholecystitis), and swelling of lung tissue (pneumonitis). Because of the risks of autoimmune problems, infusion reactions and some kinds of cancers, LEMTRADA is only available through a restricted program called the Risk Evaluation and Mitigation Strategy (REMS) Program.

SERIOUS AUTOIMMUNE PROBLEMS

Some people receiving LEMTRADA develop a condition where the immune cells in your body attack other cells or organs in the body (autoimmunity), which can be serious and may cause death. Serious autoimmune problems may include blood, thyroid and kidney disorders, such as immune thrombocytopenic purpura (ITP), and anti-glomerular basement membrane disease.

STROKE AND TEARS IN YOUR ARTERIES THAT SUPPLY BLOOD TO YOUR BRAIN

Some people have had serious and sometimes deadly strokes and tears in their carotid or vertebral arteries within 3 days of receiving LEMTRADA. Get help right away if you have any of the following symptoms that may be signs of a stroke or tears in your carotid or vertebral arteries:

  • drooping of parts of your face
  • weakness on one side
  • sudden severe headache
  • difficulty with speech
  • neck pain

CERTAIN CANCERS

LEMTRADA may also be associated with some kinds of cancers, including skin cancer (melanoma), thyroid cancer, and blood cancers (e.g., lymphoproliferative disorders and lymphoma).

Because of risks of autoimmunity, infusion reactions, and some kinds of cancers, LEMTRADA is only available through a restricted program called the LEMTRADA Risk Evaluation and Mitigation Strategy (REMS) Program.

THE MOST COMMON SIDE EFFECTS OF LEMTRADA:

  • rash
  • headache
  • thyroid problems
  • fever
  • swelling of your nose and throat
  • nausea
  • urinary tract infection
  • feeling tired
  • trouble sleeping
  • upper respiratory infection
  • herpes viral infection
  • hives
  • itching
  • fungal infection
  • joint pain
  • pain in your arms or legs
  • back pain
  • diarrhea
  • sinus infection
  • mouth pain or sore throat
  • tingling sensation
  • dizziness
  • stomach pain
  • sudden redness in face, neck, or chest
  • vomiting

Tell your healthcare provider if you have any side effect that bothers you or that does not go away. These are not all the possible side effects of LEMTRADA.

Discussing relapsing MS treatment
“ Everybody's relapsing MS and
treatment plan is different.

And everybody
reacts differently
to medications.

– Ryan
LEMTRADA Patient

What patients are saying


HEALTHCARE PROVIDER
Discussion Guide

Take this guide to your next appointment to help start the conversation about treatment with LEMTRADA.

Get The Guide