The Food and Drug Administration is strengthening efforts to detect opioids illegally entering the country through the mail, reflecting heightened concerns about the flood of synthetic fentanyl and similar drugs being shipped from China and elsewhere.
Read more here: https://www.washingtonpost.com/amphtml/news/to-your-health/wp/2017/08/04/fda-to-step-up-fentanyl-targeting-at-postal-facilities/