A possible Alzheimer's disease treatment from drugmaker Eli Lilly showed some promise in late-stage research, even though the drug failed to slow a form of mental decline in two separate studies of patients with the mind-robbing condition.

Pharmacy operator Walgreen Co. said Thursday that a key revenue metric fell 10 percent in June, as it took another step to battle a sales slump by acquiring a regional drugstore chain.

WellPoint Inc.'s fourth-quarter earnings sank 39 percent as medical claims soared thanks to a $50 million hit from the health insurer's Medicare Advantage business, but the company forecast earnings growth in 2012.