Social affairs correspondent Robert Booth tells Madeleine Finlay why a class of synthetic opioids called nitazenes, first developed in the 1950s, is leading to an alarming number of fatal overdoses in the UK. And she hears from toxicology and addiction specialist Dr Joseph D’Orazio about a sedative called xylazine which has appeared in alarming volumes in the US illicit drug stockpile and is now starting to appear in toxicology reports in the UK.
How to listen to podcasts: everything you need to know
