Ah, the doses makes sense - I was figuring even if you couldn't tell the difference with a little taste or a tiny sniff, you wouldn't go line for line without r

Ah, the doses makes sense - I was figuring even if you couldn't tell the difference with a little taste or a tiny sniff, you wouldn't go line for line without realising it wasn't coke... but if one coke-sized line of heroin is enough to OD then even if you can spot the difference easily, all it takes is doing a line without checking and you're fucked.7