Biogen’s stock rose 1% Thursday, after Europe’s pharmaceutical regulator issued a positive opinion on the Alzheimer’s disease drug that the company developed with Japanese partner Eisai — reversing an earlier decision not to approve the drug.

The European Union's drugs regulator on Thursday recommended approval for Eisai and Biogen's Leqembi in some patients with early Alzheimer's disease, nearly four months after it first rejected the treatment.

Upon reexamination, the European Medicines Agency has made a U-turn on Eisai and Biogen’s Alzheimer’s disease drug Leqembi. | Upon reexamination, the EMA has made a U-turn on Eisai and Biogen’s Alzheimer’s disease drug Leqembi.

Reversing an earlier decision, European regulators recommended that an Alzheimer’s therapy from Eisai and Biogen should be approved.

A key regulatory committee sided against the drug this summer. But an appeal from Eisai appears to have worked, teeing Leqembi up for authorization in a major market.

The European Union's drugs regulator on Thursday said it recommends approval of Eisai and Biogen's Leqembi in patients with early Alzheimer's disease, months after the agency first rejected the treatment.

The EU's drugs regulator recommends approval of Eisai and Biogen's Alzheimer's drug, Leqembi, for patients with early stages of the disease. The approval is limited to those with certain genetic profiles.

A European regulatory committee now recommends approval of the Alzheimer’s treatment lecanemab a few months after rejecting the drug.