Scientists have developed a once-a-day pill that may cure Alzheimer's disease.
The drug, called PBT2, stops the build-up of a protein called amyloid which medical experts say causes the brain to "rust."
The Australian team behind the drug says early tests on mice showed that amyloid levels dropped by 60 percent within 24 hours of a single dose of PBT2.
Professor George Fink, head of the Mental Health Research Institute in Victoria, UK, said the pill could prevent Alzheimer's developing or delay its onset. He said the pill could be on the market within four years, adding: "It is a major breakthrough. It works incredibly quickly -- within 24 hours or so.
"Though much depends on the next phase of human clinical trials, early results indicate that this drug does offer hope to people with Alzheimer's."
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