I'm posting this here as a resource. I ingested a small amount of SN last month to gauge the discomfort of the effects and it was surprisingly mild. I didn't measure exactly but I scooped some on the edge of a spoon and ate it with applesauce. all of the described symptoms took place in the span of about 40 minutes and I did have to go to the hospital afterwards. anyway, here's what I noticed physically and how I felt:
1. ate the sn. it tasted salty, as expected, but didn't hurt going down or anything. I did get some heartburn but nothing unbearable.
2. I noticed my heart rate starting to go up slightly but this happened pretty slowly, it was about 5 minutes before I was even sure it was happening. I began to have a bit of trouble breathing as well but it was barely noticeable and again, I wasn't sure if I was imagining it until about 10 minutes after ingesting. it doesn't feel like suffocating, it feels more like your chest is heavy, like there's a cat lying on it.
3. about 20 minutes in, I noticed my mouth felt very dry and at this point, I was manually breathing. I was a bit scared but I wasn't in any pain, it was actually more scary how subtly it felt. my heart was racing harder at this point and I could feel it in my throat. my fingers and toes felt numb at this point and I felt like I was seeing spots in my vision and started feeling like I was going to pass out. my blood pressure drops sometimes and the feeling was very similar. I felt dizzy and nauseous but still no physical pain for me. my head was throbbing a lot too but it just felt like pressure. I also noticed that I was shaking really hard, possibly shivering? I didn't notice feeling cold but my adrenaline was going at this point so I wasn't really paying attention anyway.
4. 30 minutes in I started to really have trouble staying conscious and decided to call a friend because I began to panic a bit. I was having trouble forming words mostly out of panic but it was also a bit more difficult to speak than I expected. I was gasping for air at this point and my heart was still racing. I attempted to stand and realized I was unable to so I decided to lie down instead. I felt no significant physical pain or discomfort outside of my panic but I was coughing a bit at this point which did cause some slight discomfort. it may not have been the sn as I usually cough during panic attacks so it could have been that but I figure I'll mention it anyway.
this was my experience. I haven't been able to stop thinking about it since and it brought me a lot more peace about my method and the effectiveness of my sn. It was extremely bearable until I started panicking but I'm planning to take something for that beforehand. I hope this is helpful to someone else.