AP Chief Medical Writer
Biogen Inc. said Tuesday it will seek federal approval for a medicine to treat early Alzheimer's disease, a landmark step toward finding a treatment that can alter the course of the most common form of dementia.
The announcement was a surprise because the drug company earlier this year stopped two studies of the drug when partial results suggested it was not likely to be successful. The company now says a new analysis of more results suggest that the drug helped reduce a decline of thinking skills at the highest dose.
The drug, called aducanumab, aims to help the body clear harmful plaques from the brain. Cambridge, Massachusetts-based Biogen is developing it with a Japanese company, Eisai Co. Ltd.
More than 5 million people in the United St