Description: Decades of work in the laboratory may finally be paying off for Alzheimer's disease patients, as clinical trials show a variety of drugs making headway against the illness. Two drugs, Dimebon and the diabetes medication Avandia, may help curb Alzheimer's in different ways. And close to five years of follow-up data suggest that an "Alzheimer's vaccine" might someday harness the power of the immune system to protect against dementia.