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FDA grants priority review to weekly at-home Alzheimer's injections
The FDA's Priority Review could allow at-home weekly subcutaneous dosing of LEQEMBI IQLIK, improving treatment convenience for early Alzheimer's patients, with approval decision by May 24, 2026.
The FDA accepted Eisai Co., Ltd.'s supplemental BLA for LEQEMBI IQLIK and granted Priority Review, setting a PDUFA action date of May 24, 2026.
Data from the Phase 3 Clarity Alzheimer's disease open‑label extension indicate Eisai Co., Ltd. and Biogen Inc. say the subcutaneous autoinjector 500 mg once‑weekly regimen achieves exposure comparable to every‑two‑weeks IV and allows at‑home administration.
On imaging, ARIA‑E rates were reported as 13 with LEQEMBI versus 2 with placebo, and overall ARIA was 21 versus 9, with symptomatic ARIA in 3 and serious ARIA in 0.7.
If approved, the autoinjector could offer a once-weekly 500 mg dose via two 250 mg injections, each taking approximately 15 seconds, complementing the 360 mg weekly SC maintenance approval .
Regulatory activity continued with LEQEMBI , Eisai Co., Ltd. completing a rolling sBLA in November 2025, and guidance advising ApoE ε4 genotype testing plus MRI monitoring protocols.