Drugs once hailed as a breakthrough in the fight against Alzheimer's disease do not meaningfully help patients, a major review found Thursday, however some experts criticized the research. The review by the Cochrane organization – which is considered the gold standard for analyzing existing evidence – looked at drugs that target a plaque called amyloids, which builds up in the brains of Alzheimer's patients. Researchers have long sought a way to eliminate this plaque, believing it could be the