Eli Lilly (LLY.US) stock plunged more than 8% after the drug maker announced its experimental treatment for Alzheimer’s called donanemab, modestly slowed decline in patients over an 18-month period in a mid-stage study. The data reinforced previously released top-line data that showed donanemab slowed the cognitive decline in patients with early symptoms of dementia. However the drug showed "no substantial difference" than a placebo in secondary outcomes like an improvement in scores on the Clinical Dementia Rating Scale Sum of Boxes. Company already initiated a second study of the treatment.
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