It would be an over-the-counter, diphenhydramine tablet.
I suffer insomnia from time to time, and seem to be in the middle of a bout right now. Dh is away a lot during the week - he has work in London, and his mum is terminally ill, so he is staying at her house, to spend as much time as possible with her before the end.
Only ds3 is at home (the other two are at university), and he is 17 - so not a little child who would need rescuing in case of an emergency.
I didn't get to sleep until about 6.30am on Monday, and about 4am this morning, and I am feeling utterly wrecked. Dh is not back until tomorrow night, and I worry about taking a drug that will make me sleepy, and not able to drive, and that might make me react less quickly if there was some sort of emergency.
There is a part of me that knows I am being a bit ridiculous - maybe more than a bit, to be fair - the chances of anything terrible happening are pretty slim, we have a smoke alarm, ds3 is old enough and sensible enough to be left home alone, and the tablet won't render me unrousable - it will just help me go to sleep, and hopefully once asleep, I will stay asleep unless there is an emergency.
To be honest, I don't even drink if I am the only adult at home - or even if ds1, who is 21 and can drive one of our cars is at home - and I think I might be being completely barking more than a bit paranoid.
WWYD?