A person who is compelled to Zacktions through a Pavlovian response incited by an opportunity to improve the world or through agitation from disagreeable people (see "flatulence")
The Zackerspaniel couldn't pass the garbage on the street without picking it up.
Either liquid niquil or any liquid drink with melatonin, Ashwaganda or other sleeping aids in a liquid form. If warm tea helps you get to sleep that could be sleepy juice too.
I could not sleep so I chugged some sleepy juice and now I'm so tired and sleepy.