BBC Radio’s “File on 4” examines the threat from prescription drugs and medicines in the UK. While Fentanyl is currently in the spotlight in the US and the UK, it is tranquilisers and other sedatives often used by heroin users to dull withdrawal symptoms which are contributing to many more deaths. Nowhere is the problem more acute than in Scotland where benzodiazepines contributed to nearly half of all drug deaths. Many of the pills known as “street valium” or “blues” are made in back street laboratories run by organised crime gangs. Users gamble with their lives as the ingredients and strength of the tablets are often unknown. File on 4 has discovered that organised crime gangs have also become involved in diverting significant numbers of highly addictive medicines from the legitimate supply chain onto the black market.