The night and day preoccupation with poor sleep and tiredness, and trying to resolve it, sets up a frustrating struggle that is the awful truth of insomnia: the harder you try to make sleep work, the worse it gets.

With the best will in the world aviation organisations can structure rosters to safeguard employees' opportunity to sleep. But this can't of itself prevent insomnia & fatigue affecting employees.
Sleep deprivation is ability to sleep but not enough opportunity to sleep.
Insomnia is enough opportunity to sleep but seemingly lost ability to sleep.

LetSleepHappen submitted sleep medication accidental overdose data to the Australian Federal Sleep Health Awareness Inquiry on 11/2/19. Investigating the psychology of accidental overdose is crucial given the hundreds of Australians unknowingly combining lethal levels of prescription sedatives every year, in a bid to sleep and quell anxiety or chronic pain.