The first evidence that sleep deprivation has a neurological link to anxiety, depression and other psychiatric disorders, has been published in the October edition of the journal Current Biology. The need for sleep is best illustrated by what happens to us when we are deprived of it. A go...
To me, this would explain why someone who was sleep deprived and depressed would impulsively overdose.
I have done this and it seemed rational
at the time to "knock myself out" in spite of the serious consequences.
Thank you, Margaret G