Serotonin syndrome is PURE HELL!! The experience I have had was million times worse than several broken bones and suffocation until death (if you can call it that but I had nde) from an accident. The suffering was equal to emergency surgery without anesthesia which sadly happened to me once also.
Doctor had accidentally given me another medication for nerve pain with serotonin then. The suffering must be much worse with higher doses.
Medications are not for euthanasia. They will most likely give extreme torture and most can't handle it and call 911. Only those that are written in peacefull pill handbook can give peacefull death with right doses.
It felt like having thousands of ants under skin and like my brain was electrocuted constantly. I got twitches in all muscles. It was pure torture, hell and panic.
Worse than what you see in horror movies.