Coma after SN

[katy]

As I will not be found for at least a few days (probably longer) after taking SN, I am thinking of sending a note to the police informing them of what will have happened so my body can be recovered. My concern is that I may fail and fall into a coma. Does anyone know how long I would need to be in this coma before I die naturally? Presumably, there is a point beyond which I couldn't be resuscitated? I obviously don't want anyone to read any note too early. My biggest dread would be waking from this coma on my own and then dying an awful death from dehydration (and whatever pain, etc I may be in) as I wouldn't be able to contact anyone for help.