Does one exist? Im thinking not but i wonder if a certain mixtures could cause enough relaxation to make one tired.
I believe TAK is supposed to have some sleepy qualities…try doing an advanced search searching titles only, put TAK as the subject. I could be wrong, but I’m pretty sure it was TAK.
TAK makes me tired after a few hours but for me I reach for Spaceland if I can’t sleep. Best nights sleep EVER. 
Gotta get me a new big bottle of that if its in stock. Gave it to a friend for her insomnia. Yeah, it worked for her to.
I will say that under normal circumstances I see people get into fits of the giggles with Spaceland but for me, it works great to spray a bit on the top of my hand (I put my hand near my face when I sleep) and boom, I’m out.
I have a feeling the combination of the scent and the pheros are what do it for me. The scent definitely makes me very relaxed on its own.
Hmm, cool. I must try this spaceland
When you aren’t trying to sleep, it is fun stuff! 
I like Spaceland but it tend to help create excitement and motormouth, not sleepiness. Great for drunken parties. Melatonin makes me sleepy most of the time.