Help IV in the context of suicide.

[Caribbean Sky]

IV has a broad medical use so I'm wanting to know how specifically to set it up for suicide so I do it correctly.
The drug this IV suicide will be specific to is fentanyl or a nitazene, maybe heroin.

Does the IV have to be ongoing or would it be just a quick injection? Am I just flushing my entire fatal dose? Should I use a catheter/butterfly needle? How can I avoid doing it 'too fast' so that I don't pass out before my death?
Please tell this moron how to use iv properly for suicide with an opioid.

 

[2messdup]

IV has a broad medical use so I'm wanting to know how specifically to set it up for suicide so I do it correctly.
The drug this IV suicide will be specific to is fentanyl or a nitazene, maybe heroin.

Does the IV have to be ongoing or would it be just a quick injection? Am I just flushing my entire fatal dose? Should I use a catheter/butterfly needle? How can I avoid doing it 'too fast' so that I don't pass out before my death?
Please tell this moron how to use iv properly for suicide with an opioid.

Sorry idk the answer. So that's two of us who are morons (you are not by the way, cos if you were you wouldn't have even thought of this question).