NEW You can now listen to Fox News articles! Fox News' Health newsletter brings you stories on the latest developments in healthcare, wellness, diseases, mental health and more. TOP 3: - Nearly half of deadly wrecks tied to illegal drug - Paralyzed man walks again after experimental drug trial - Experts warn of unregulated weight-loss drugs This week's top health news includes the drug causing crash deaths and unregulated "gray-market" weight-loss pills flooding the U.S., among others. (iStock)