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Leqembi

Lecanemab-Irmb
Antialzheimer
Injection

Leqembi is a prescription medicine for early-stage Alzheimer’s disease. It’s a monoclonal antibody that helps reduce amyloid plaques in the brain and is the first treatment of its kind approved in the European Union.

Approval Date
06-Jan-23
Data Exclusivity Expiry
06-Jan-27
Market Exclusivity Expiry
06-Jan-35
Commercial snapshot

Market performance & projections

Revenue ($M)
617
CAGR (%)
0.5211
Projected sales, 2026–2032 ($M)
Analyst projection, $M per year
2026
1223
2027
1819
2028
2579
2029
3303
2030
3941
2031
4446
2032
4919
Molecule profile

Details & specifications

Molecule
Lecanemab-Irmb
Innovator
EISAI INC.
Dosage Form
Injection
Strength
500 mg/5 mL (100 mg/mL), 200 mg/2 mL (100 mg/mL)
Therapeutic Category
Antialzheimer
Usage
To treat Alzheimer’s disease
Good to know

Frequently asked questions

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Intelligence you can file on

Verified regulatory data
Milestones tracked against primary FDA sources and refreshed continuously.
Analyst-built projections
Seven-year sales outlooks modeled by our pharma intelligence team.
First-to-file focus
Exclusivity windows framed around the decisions generics teams actually make.
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What is Leqembi and how does it work?
Who is eligible for Leqembi treatment?
How is Leqembi administered?
What are the potential side effects and monitoring requirements?
Leqembi is a monoclonal antibody treatment for early-stage Alzheimer’s disease. It works by targeting and reducing amyloid plaques in the brain, potentially helping to slow cognitive decline in patients with mild cognitive impairment or mild dementia.
Leqembi is for patients with early-stage Alzheimer’s disease, specifically mild cognitive impairment or mild dementia. Patients must have confirmed elevated beta-amyloid in the brain through testing like PET scans or spinal fluid analysis.
Leqembi is given as an IV infusion every two weeks at a healthcare facility. Each session requires medical supervision and regular monitoring by healthcare professionals.
The most common side effects of LEQEMBI include infusion-related reactions, ARIA, and headaches.

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