Fentanyl substitution for heroin. A working hypothesis
Fentanyl substitution for heroin. A working hypothesis By David Pere Martínez Oró. In Spain, we do not have any robust evidence that would allow us to affirm that the consumption of fentanyl, produced clandestinely, is a reality. The Spanish Early Warning System (SEAT) of the Government Delegation for the National Plan on Drugs has not, […]