Upset is not the opposite of sleepy. Alert or awake would be better choices.
They contain tyrosine and tryptophan- one makes you alert and the other makes you sleepy
The hare:fast and sleepy, the tortoise:slow and alert
Doc, grumpy, sneezy, sleepy, happy, dopey, bashful
That is the Volvo Driver Alert System it doesn't know when you are "sleepy" but detects lane drift and lane changes.
happy, hungry, sleepy
Hungry, Happy, Sleepy :D
happy, hungry, horny, sleepy.
The word is "awake" or as an alternative, "alert" (as opposed to sleepy).
To alert sleepy/drowsy drivers when they drift off of the roadway
You get happy and hungry and sleepy
Hungary, Happy, Sleepy