Every person who has been kind enough to document their SN experience here has reported tachycardia with SN. The elevated heart-rate is especially conerning to me. One of my main reasons to CTB is due to my heart health challenges.
The racing heart, nausea, vomiting and light-headedness are 1 to 1 reminiscent of the panic attacks I deal with every week. I'm starting to warm up to the idea of benzos and opiates taken togther as a CTB method. SN just doesn't fit the bill to what I'd consider peaceful. I suppose if you have a strong resolve to die than this might not be a concern to you at all, but I know there are other ultra-sensitive people on this board who are turned off by SN for the same reasons I listed.
I feel like SN leads to a random "lights out" effect, instead of something like nembutal where you are cradled to sleep fairly quickly, but still given the dignity of a peaceful death by simply giving into the overwhelming need to catch some ZZZs. I want to die in my sleep instead of being struck with a final bout of fainting unconsciousness.
I'm probably overthinking this though, maybe even coming up with excuses, because there probably is no truly "peaceful death" because even if an intentional ingestion of a fatal sleep-promoting substance still requires a great amount of valiance and determination to accomplish because your survival instinct will be doubting your choice the entire time.