This article does not necessarily provide any new information, but I really liked it, as it summarizes all of the most commonly used drugs for assisted dying. This is essentially the best that we have up with as species (within the legal restrictions). And yet, there are still many complications with these drugs, given that peaceful death is the key goal. Overall, it appears that any method with drug ingestion orally will be much less peaceful than a method where an anesthetic injection is administered at first. At least for me, this makes me want to diverge from the original SN method and try to obtain some sort of intravenous anesthetic right after ingestion of SN.
Article: https://www.researchgate.net/publication/360425015_Efficacy_and_safety_of_drugs_used_for_'assisted_dying'
Article: https://www.researchgate.net/publication/360425015_Efficacy_and_safety_of_drugs_used_for_'assisted_dying'
