Concerns Grow Over Safety of Aduhelm After Death of Patient Who Got the Drug November 22, 2021 Auto Bot Aduhelm (Drug), alzheimer's disease, Biogen Inc, Brain, Clinical Trials, Deaths (Fatalities), elderly, Food and Drug Administration, JAMA Neurology (Journal), Labeling and Labels (Product), RBC Capital Markets, Research, your-feed-science 0 Newly published safety data shows that 41 percent of patients in key clinical trials of the Alzheimer’s drug experienced brain bleeding or swelling, though many cases were asymptomatic.