Writing a story and I need to know more about this drug as an aid in assassination. Is it detectable during an autopsy or does it appear as natural cause (i.e. respiratory failure)? Does it work if simply drunk rather than injected? How fast would it work if drunk? How fast if injected? How high a dose is needed for it to be lethal? I don't do anything half-assed. If I'm discussing something in my writings I want to know what I'm talking about but I can't seem to find these answers online.