I've seen many goodbye threads of people who supposedly ctb by following Stan's Guide but of course I can't confirm if they've really passed away.
The only thing I can tell you is that Dani, one amazing member of SS, ctb by SN and only took ibuprofen.
You can check his goodbye thread for more details here:
https://sanctioned-suicide.net/threads/goodbye-thread-today-10-00-pm-utc-2.50562/