Same here in the US. I live in a heavily effected area and its always the same thing fentanyl. People are used to taking a certain dose so that's what they do not knowing fentanyl is in there and it usually results in a death unless someone has or can get narcan there quickly.
Part of me wonders why they don't just do a little first and then do more, but I guess I get it- they are addicted and they just want their fix ASAP.