As someone who's failed an SN attempt and has chronic stomach issues and nausea due to bulimia, sadly because I messed up and didn't follow Stans guide or anything, I suffered severely. I took no painkillers, antiemetics or benzos and I regret it a lot. There was no pain but what's easily just as bad or if not worse of an experience was experiencing syncope, body on fire feeling Racing heart and lightheadedness. Yes it something I experience weekly due to low electrolytes but it is always terrifying when my vision and hearing goes muffled, and start seeing stars. It's just SN made those symptoms unbearable to go through again, and sadly because I vomited a few minutes after and failed to re dose I ce am still here today.