A newly approved Alzheimer's drug will be available to patients in the coming days, according to its maker, the Japanese pharmaceutical company Eisai.
While Leqembi offers hope to patients and their families, experts say that there are still some key unanswered questions about the drug, including about its safety and effectiveness.
Besides questions about who will benefit the most, there are also questions about how long the drug will benefit patients.
About 17% of the Leqembi group experienced brain bleeds, compared with 9% in the placebo group.
The reports of brain bleeding and brain swelling "may only be the tip of the iceberg," he said.