Leqembi

Moderate Warnings

Generic: lecanemab

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Information reviewed July 24, 2026

Rank #97 in US TV Ads
Class: Anti-Amyloid Monoclonal Antibody

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What is it for?

An infused treatment for early Alzheimer's disease that targets the amyloid plaques in the brain associated with the condition.

Primary Condition

Early Alzheimer's disease

How it works

A monoclonal antibody that binds to and helps clear beta-amyloid, a protein that clumps into plaques in the brains of people with Alzheimer's.

Common Side Effects

This is not a complete list of side effects. Always consult with a doctor.

  • Brain swelling (ARIA)
  • Brain bleeding (ARIA)
  • Infusion reactions
  • Headache

Leqembi FAQs

What is Leqembi used for?

Leqembi (lecanemab) is a prescription medication used to treat Early Alzheimer's disease. An infused treatment for early Alzheimer's disease that targets the amyloid plaques in the brain associated with the condition.

How does Leqembi work?

A monoclonal antibody that binds to and helps clear beta-amyloid, a protein that clumps into plaques in the brains of people with Alzheimer's.

What are the common side effects of Leqembi?

Commonly reported side effects of Leqembi include Brain swelling (ARIA), Brain bleeding (ARIA), Infusion reactions, and Headache. This is not a complete list — tell your doctor or pharmacist about any side effects you experience.

Does Leqembi have any serious warnings?

Leqembi has notable warnings and precautions. Tell your doctor about your medical history and any other medicines or supplements you take before starting Leqembi.

What is the generic name for Leqembi?

The active ingredient in Leqembi is lecanemab, which belongs to a class of medicines known as Anti-Amyloid Monoclonal Antibody.

Who makes Leqembi?

Leqembi is manufactured by Eisai. It was first approved in 2023.

How can I save money on Leqembi?

You may be able to lower the cost of Leqembi by using a free pharmacy discount card or by comparing prices across pharmacies before you fill your prescription. Savings vary by pharmacy and location.

Common questions about Leqembi

Other Neurology medications

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Quick Facts

Manufacturer

Eisai

Year Approved

2023

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