SN side effects

[hiki-loser]

When trying to create this topic a couple other threads came up but they didn't have any clear or sourced answers so I'm creating another one.

Someone described a failed attempt with SN that left them with a UTI, a follow up post suggested a full recovery is the norm, what else is known about this method when it fails?

An excerpt of something I found off site about what happens when it fails, link to source here

The patient reported losing consciousness after ingestion and waking up in his own vomit and feces. He felt confused and called EMS. In the emergency department (ED), the patient acknowledged nausea, vomiting, and bowel incontinence. He complained of severe diffuse abdominal pain that was 8/10 in severity.

I'm still considering this method the most but I want to have a clear idea of the side effects of something when it fails, if anyone can find more resources of possible side effects and likelihood of experiencing them, preferably with some kind of source, please post them here