By Julia Harte WASHINGTON (Reuters) – Synthetic designer drugs, especially synthetic opioids like fentanyl implicated in the death of pop star Prince, pose an “unprecedented” threat for U.S. overdoses and deaths, especially among youth, the country’s top anti-drug official said on Tuesday. The U.S. Drug Enforcement Administration has been cracking … Continue reading Synthetic drugs pose alarming U.S. overdose risk: DEA chief