No idea. Its kinda crazy because they will do hospice where you allow them to die and give painkillers to mitigate the torture but won’t just end it. My mom had a stroke and they would not give her an overdose of barbituates but would give her some so her dehydration death was theoretically not as painful as it might otherwise be for whatever she could feel in her kinda coma condition. Took a week or more. They say 3 days without water but it takes longer than that.