‘Iso,’ a Deadly New Synthetic Opioid, Has Hit American Streets

A new synthetic opioid as powerful as fentanyl is causing overdose deaths at an ever-increasing rate, experts warn. What’s worse, the designer drug is legal in most places in the United States. Isotonitazene — commonly referred to as “iso” — is causing around 40 to 50 overdose deaths a month in the United States, compared with about six per month last summer, said Dr. Antonio … Continue reading ‘Iso,’ a Deadly New Synthetic Opioid, Has Hit American Streets