Insomnia (n.) is being able to sleep better with a pill than with a pillow.
Insomnia (n.) is either being asleep with one eye open, or awake with both eyes shut.
Insomnia (n.) is either being wide awake because one can't sleep, or being unable to sleep because one is wide awake.
Insomnia (n.) is finding it hard to fall asleep at night, and even harder to stay awake by day.
Insomnia (n.) is often about lying about lying awake all night.
Insomnia (n.) is one of the ailments conveyed to man from dogs; some people get it from the dog next door.
Insomnia (n.) is really bad if one can't even sleep when it's time to get up.