Viagra and shingles vaccine show surprising promise against Alzheimer’s

A major new study has spotlighted three familiar medicines that could take on an unexpected new role in the fight against Alzheimer’s disease — with a shingles vaccine emerging as the front-runner. After reviewing 80 existing drugs, an international panel of experts identified Zostavax, Viagra (sildenafil), and riluzole as the most promising candidates for repurposing.  

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