Existing drugs could be repurposed for longevity by tapping network of aging-related genes

The quest to prolong life has gone on for as long as human existence itself, from the mythical Fountain of Youth to quick-fix fads like intermittent fasting, supplements and injections. But if you take a look in your medicine cabinet, you may unwittingly come across a drug that holds a key to longevity. Could that nasal spray for your stuffy nose be repurposed to reverse one or more of the processes of aging?